690697290724 has 243 divisors, whose sum is σ = 1539582314907. Its totient is φ = 270307758336.

The previous prime is 690697290721. The next prime is 690697290761. The reversal of 690697290724 is 427092796096.

The square root of 690697290724 is 831082.

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 63243196324 + 627454094400 = 251482^2 + 792120^2 .

It is not an unprimeable number, because it can be changed into a prime (690697290721) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 7760643672 + ... + 7760643760.

Almost surely, 2^690697290724 is an apocalyptic number.

690697290724 is the 831082-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690697290724

690697290724 is an abundant number, since it is smaller than the sum of its proper divisors (848885024183).

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

690697290724 is a wasteful number, since it uses less digits than its factorization.

690697290724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 61.

The spelling of 690697290724 in words is "six hundred ninety billion, six hundred ninety-seven million, two hundred ninety thousand, seven hundred twenty-four".