691367936 has 52 divisors (see below), whose sum is σ = 1580142192. Its totient is φ = 296288256.

The previous prime is 691367933. The next prime is 691368001. The reversal of 691367936 is 639763196.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691367933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16616 + ... + 40728.

Almost surely, 2^691367936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691367936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790071096).

691367936 is an abundant number, since it is smaller than the sum of its proper divisors (888774256).

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

691367936 is an equidigital number, since it uses as much as digits as its factorization.

691367936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24144 (or 24122 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 50.

The square root of 691367936 is about 26293.8763973667. The cubic root of 691367936 is about 884.2391605319.

The spelling of 691367936 in words is "six hundred ninety-one million, three hundred sixty-seven thousand, nine hundred thirty-six".