697964538 has 16 divisors (see below), whose sum is σ = 1404822240. Its totient is φ = 231172656.

The previous prime is 697964507. The next prime is 697964539. The reversal of 697964538 is 835469796.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (697964539) 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 7 ways as a sum of consecutive naturals, for example, 369528 + ... + 371411.

It is an arithmetic number, because the mean of its divisors is an integer number (87801390).

Almost surely, 2^697964538 is an apocalyptic number.

697964538 is an abundant number, since it is smaller than the sum of its proper divisors (706857702).

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

697964538 is a wasteful number, since it uses less digits than its factorization.

697964538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741101.

The product of its digits is 9797760, while the sum is 57.

The square root of 697964538 is about 26419.0184904739. The cubic root of 697964538 is about 887.0425496269.

It can be divided in two parts, 6979 and 64538, that added together give a palindrome (71517).

The spelling of 697964538 in words is "six hundred ninety-seven million, nine hundred sixty-four thousand, five hundred thirty-eight".