297638986969 has 9 divisors (see below), whose sum is σ = 299706111999. Its totient is φ = 295586033400.

The previous prime is 297638986949. The next prime is 297638986973. The reversal of 297638986969 is 969689836792.

It is a happy number.

The square root of 297638986969 is 545563.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 164737225 + 297474249744 = 12835^2 + 545412^2 .

It is not a de Polignac number, because 297638986969 - 2⁹ = 297638986457 is a prime.

It is a super-2 number, since 2×297638986969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 297638986892 and 297638986901.

It is not an unprimeable number, because it can be changed into a prime (297638986949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 82378207 + ... + 82381819.

It is an arithmetic number, because the mean of its divisors is an integer number (33300679111).

Almost surely, 2^297638986969 is an apocalyptic number.

297638986969 is the 545563-rd square number.

297638986969 is the 272782-nd centered octagonal number.

It is an amenable number.

297638986969 is a deficient number, since it is larger than the sum of its proper divisors (2067125030).

297638986969 is an frugal number, since it uses more digits than its factorization.

297638986969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7528 (or 3764 counting only the distinct ones).

The product of its digits is 3809369088, while the sum is 82.

The spelling of 297638986969 in words is "two hundred ninety-seven billion, six hundred thirty-eight million, nine hundred eighty-six thousand, nine hundred sixty-nine".