690152409 has 24 divisors (see below), whose sum is σ = 1057399200. Its totient is φ = 432544320.

The previous prime is 690152401. The next prime is 690152443. The reversal of 690152409 is 904251096.

690152409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690152409 - 2³ = 690152401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690152401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6997 + ... + 37805.

It is an arithmetic number, because the mean of its divisors is an integer number (44058300).

Almost surely, 2^690152409 is an apocalyptic number.

It is an amenable number.

690152409 is a deficient number, since it is larger than the sum of its proper divisors (367246791).

690152409 is a wasteful number, since it uses less digits than its factorization.

690152409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30965 (or 30962 counting only the distinct ones).

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

The square root of 690152409 is about 26270.7519686818. The cubic root of 690152409 is about 883.7206488348.

It can be divided in two parts, 690152 and 409, that added together give a square (690561 = 831²).

The spelling of 690152409 in words is "six hundred ninety million, one hundred fifty-two thousand, four hundred nine".