931489428769 has 9 divisors (see below), whose sum is σ = 933424677913. Its totient is φ = 929558189632.

The previous prime is 931489428707. The next prime is 931489428781. The reversal of 931489428769 is 967824984139.

The square root of 931489428769 is 965137.

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

It can be written as a sum of positive squares in 4 ways, for example, as 173043520225 + 758445908544 = 415985^2 + 870888^2 .

It is not a de Polignac number, because 931489428769 - 2⁷ = 931489428641 is a prime.

It is a super-2 number, since 2×931489428769² (a number of 25 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 = 931489428698 and 931489428707.

It is not an unprimeable number, because it can be changed into a prime (931489428269) 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, 780795237 + ... + 780796429.

Almost surely, 2^931489428769 is an apocalyptic number.

931489428769 is the 965137-th square number.

931489428769 is the 482569-th centered octagonal number.

It is an amenable number.

931489428769 is a deficient number, since it is larger than the sum of its proper divisors (1935249144).

931489428769 is an frugal number, since it uses more digits than its factorization.

931489428769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004 (or 2002 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 70.

The spelling of 931489428769 in words is "nine hundred thirty-one billion, four hundred eighty-nine million, four hundred twenty-eight thousand, seven hundred sixty-nine".