690617834 has 4 divisors (see below), whose sum is σ = 1035926754. Its totient is φ = 345308916.

The previous prime is 690617789. The next prime is 690617857. The reversal of 690617834 is 438716096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 481670809 + 208947025 = 21947^2 + 14455^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172654457 + ... + 172654460.

Almost surely, 2^690617834 is an apocalyptic number.

690617834 is a deficient number, since it is larger than the sum of its proper divisors (345308920).

690617834 is a wasteful number, since it uses less digits than its factorization.

690617834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345308919.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 690617834 is about 26279.6087109378. The cubic root of 690617834 is about 883.9192587135.

The spelling of 690617834 in words is "six hundred ninety million, six hundred seventeen thousand, eight hundred thirty-four".