689902542 has 32 divisors (see below), whose sum is σ = 1752134400. Its totient is φ = 197114904.

The previous prime is 689902523. The next prime is 689902561. The reversal of 689902542 is 245209986.

It is an interprime number because it is at equal distance from previous prime (689902523) and next prime (689902561).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 912192 + ... + 912947.

It is an arithmetic number, because the mean of its divisors is an integer number (54754200).

Almost surely, 2^689902542 is an apocalyptic number.

689902542 is an abundant number, since it is smaller than the sum of its proper divisors (1062231858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689902542 is a wasteful number, since it uses less digits than its factorization.

689902542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825157 (or 1825151 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 689902542 is about 26265.9959262922. The cubic root of 689902542 is about 883.6139867517.

The spelling of 689902542 in words is "six hundred eighty-nine million, nine hundred two thousand, five hundred forty-two".