690613539 has 32 divisors (see below), whose sum is σ = 1208463360. Its totient is φ = 339876000.

The previous prime is 690613499. The next prime is 690613543. The reversal of 690613539 is 935316096.

690613539 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 690613539 - 2¹³ = 690605347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 690613539.

It is not an unprimeable number, because it can be changed into a prime (690613549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74287 + ... + 83064.

It is an arithmetic number, because the mean of its divisors is an integer number (37764480).

Almost surely, 2^690613539 is an apocalyptic number.

690613539 is a deficient number, since it is larger than the sum of its proper divisors (517849821).

690613539 is a wasteful number, since it uses less digits than its factorization.

690613539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157391.

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 690613539 is about 26279.5269934601. The cubic root of 690613539 is about 883.9174263248.

The spelling of 690613539 in words is "six hundred ninety million, six hundred thirteen thousand, five hundred thirty-nine".