690124291 has 4 divisors (see below), whose sum is σ = 691541872. Its totient is φ = 688706712.

The previous prime is 690124283. The next prime is 690124307. The reversal of 690124291 is 192421096.

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

It is a cyclic number.

It is not a de Polignac number, because 690124291 - 2³ = 690124283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690124271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708060 + ... + 709033.

It is an arithmetic number, because the mean of its divisors is an integer number (172885468).

Almost surely, 2^690124291 is an apocalyptic number.

690124291 is a deficient number, since it is larger than the sum of its proper divisors (1417581).

690124291 is a wasteful number, since it uses less digits than its factorization.

690124291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417580.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 690124291 is about 26270.2168053482. The cubic root of 690124291 is about 883.7086472371.

The spelling of 690124291 in words is "six hundred ninety million, one hundred twenty-four thousand, two hundred ninety-one".