690883679 has 2 divisors, whose sum is σ = 690883680. Its totient is φ = 690883678.

The previous prime is 690883667. The next prime is 690883703. The reversal of 690883679 is 976388096.

690883679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690883679 - 2⁸ = 690883423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690883619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345441839 + 345441840.

It is an arithmetic number, because the mean of its divisors is an integer number (345441840).

Almost surely, 2^690883679 is an apocalyptic number.

690883679 is a deficient number, since it is larger than the sum of its proper divisors (1).

690883679 is an equidigital number, since it uses as much as digits as its factorization.

690883679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 690883679 is about 26284.6662333764. Note that the first 3 decimals coincide. The cubic root of 690883679 is about 884.0326621805.

The spelling of 690883679 in words is "six hundred ninety million, eight hundred eighty-three thousand, six hundred seventy-nine".