691311130 has 16 divisors (see below), whose sum is σ = 1250878464. Its totient is φ = 275075920.

The previous prime is 691311119. The next prime is 691311133. The reversal of 691311130 is 31113196.

It is a happy number.

It is a super-2 number, since 2×691311130² = 955822156923753800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 691311095 and 691311104.

It is not an unprimeable number, because it can be changed into a prime (691311133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179062 + ... + 182881.

It is an arithmetic number, because the mean of its divisors is an integer number (78179904).

Almost surely, 2^691311130 is an apocalyptic number.

691311130 is a deficient number, since it is larger than the sum of its proper divisors (559567334).

691311130 is a wasteful number, since it uses less digits than its factorization.

691311130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362141.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 691311130 is about 26292.7961616866. The cubic root of 691311130 is about 884.2149421368.

The spelling of 691311130 in words is "six hundred ninety-one million, three hundred eleven thousand, one hundred thirty".