691064227 has 8 divisors (see below), whose sum is σ = 803174400. Its totient is φ = 582300744.

The previous prime is 691064221. The next prime is 691064239. The reversal of 691064227 is 722460196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-691064227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (691064221) 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, 836227 + ... + 837052.

It is an arithmetic number, because the mean of its divisors is an integer number (100396800).

Almost surely, 2^691064227 is an apocalyptic number.

691064227 is a deficient number, since it is larger than the sum of its proper divisors (112110173).

691064227 is a wasteful number, since it uses less digits than its factorization.

691064227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673345.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 691064227 is about 26288.1004829181. The cubic root of 691064227 is about 884.1096632891.

The spelling of 691064227 in words is "six hundred ninety-one million, sixty-four thousand, two hundred twenty-seven".