690815133 has 12 divisors (see below), whose sum is σ = 1011514140. Its totient is φ = 454234176.

The previous prime is 690815113. The next prime is 690815141. The reversal of 690815133 is 331518096.

It is a happy number.

690815133 is a `hidden beast` number, since 69 + 0 + 81 + 513 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 395731449 + 295083684 = 19893^2 + 17178^2 .

It is not a de Polignac number, because 690815133 - 2¹⁴ = 690798749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690815113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 525078 + ... + 526391.

It is an arithmetic number, because the mean of its divisors is an integer number (84292845).

Almost surely, 2^690815133 is an apocalyptic number.

It is an amenable number.

690815133 is a deficient number, since it is larger than the sum of its proper divisors (320699007).

690815133 is a wasteful number, since it uses less digits than its factorization.

690815133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051548 (or 1051545 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 690815133 is about 26283.3622849132. The cubic root of 690815133 is about 884.0034247903.

The spelling of 690815133 in words is "six hundred ninety million, eight hundred fifteen thousand, one hundred thirty-three".