690641834 has 16 divisors (see below), whose sum is σ = 1080063072. Its totient is φ = 330924048.

The previous prime is 690641803. The next prime is 690641851. The reversal of 690641834 is 438146096.

690641834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×690641834² = 953972285741767112, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 690641791 and 690641800.

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, 71204 + ... + 80319.

It is an arithmetic number, because the mean of its divisors is an integer number (67503942).

Almost surely, 2^690641834 is an apocalyptic number.

690641834 is a deficient number, since it is larger than the sum of its proper divisors (389421238).

690641834 is a wasteful number, since it uses less digits than its factorization.

690641834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151621.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 690641834 is about 26280.0653347742. The cubic root of 690641834 is about 883.9294977659.

The spelling of 690641834 in words is "six hundred ninety million, six hundred forty-one thousand, eight hundred thirty-four".