697854732129 has 9 divisors (see below), whose sum is σ = 1008016010833. Its totient is φ = 465234817332.

The previous prime is 697854732079. The next prime is 697854732161. The reversal of 697854732129 is 921237458796.

The square root of 697854732129 is 835377.

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

697854732129 is a `hidden beast` number, since 6 + 9 + 78 + 547 + 3 + 2 + 12 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 697854732129 - 2⁹ = 697854731617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (697854732199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2366902 + ... + 2645360.

Almost surely, 2^697854732129 is an apocalyptic number.

697854732129 is the 835377-th square number.

697854732129 is the 417689-th centered octagonal number.

It is an amenable number.

697854732129 is a deficient number, since it is larger than the sum of its proper divisors (310161278704).

697854732129 is an frugal number, since it uses more digits than its factorization.

697854732129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556924 (or 278462 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 697854732129 in words is "six hundred ninety-seven billion, eight hundred fifty-four million, seven hundred thirty-two thousand, one hundred twenty-nine".