697632426 has 20 divisors (see below), whose sum is σ = 1563213762. Its totient is φ = 232544088.

The previous prime is 697632409. The next prime is 697632427. The reversal of 697632426 is 624236796.

697632426 is a `hidden beast` number, since 6 + 9 + 7 + 632 + 4 + 2 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 693005625 + 4626801 = 26325^2 + 2151^2 .

It is not an unprimeable number, because it can be changed into a prime (697632427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2153025 + ... + 2153348.

Almost surely, 2^697632426 is an apocalyptic number.

697632426 is an abundant number, since it is smaller than the sum of its proper divisors (865581336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697632426 is a wasteful number, since it uses less digits than its factorization.

697632426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4306387 (or 4306378 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 697632426 is about 26412.7322706304. The cubic root of 697632426 is about 886.9018336843.

The spelling of 697632426 in words is "six hundred ninety-seven million, six hundred thirty-two thousand, four hundred twenty-six".