691996502 has 16 divisors (see below), whose sum is σ = 1056577200. Its totient is φ = 339834528.

The previous prime is 691996489. The next prime is 691996523. The reversal of 691996502 is 205699196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39368 + ... + 54164.

It is an arithmetic number, because the mean of its divisors is an integer number (66036075).

Almost surely, 2^691996502 is an apocalyptic number.

691996502 is a deficient number, since it is larger than the sum of its proper divisors (364580698).

691996502 is a wasteful number, since it uses less digits than its factorization.

691996502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15215.

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 691996502 is about 26305.8263888440. The cubic root of 691996502 is about 884.5070518094.

The spelling of 691996502 in words is "six hundred ninety-one million, nine hundred ninety-six thousand, five hundred two".