690540579 has 16 divisors (see below), whose sum is σ = 1076867200. Its totient is φ = 436130568.

The previous prime is 690540577. The next prime is 690540581. The reversal of 690540579 is 975045096.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (690540577) and next prime (690540581).

It is not a de Polignac number, because 690540579 - 2¹ = 690540577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690540577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672529 + ... + 673554.

It is an arithmetic number, because the mean of its divisors is an integer number (67304200).

Almost surely, 2^690540579 is an apocalyptic number.

690540579 is a deficient number, since it is larger than the sum of its proper divisors (386326621).

690540579 is a wasteful number, since it uses less digits than its factorization.

690540579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346111 (or 1346105 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 690540579 is about 26278.1388039564. The cubic root of 690540579 is about 883.8862980198.

The spelling of 690540579 in words is "six hundred ninety million, five hundred forty thousand, five hundred seventy-nine".