689997542 has 16 divisors (see below), whose sum is σ = 1116587472. Its totient is φ = 317895840.

The previous prime is 689997527. The next prime is 689997589. The reversal of 689997542 is 245799986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8393 + ... + 38084.

It is an arithmetic number, because the mean of its divisors is an integer number (69786717).

Almost surely, 2^689997542 is an apocalyptic number.

689997542 is a deficient number, since it is larger than the sum of its proper divisors (426589930).

689997542 is a wasteful number, since it uses less digits than its factorization.

689997542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47063.

The product of its digits is 9797760, while the sum is 59.

The square root of 689997542 is about 26267.8042858553. The cubic root of 689997542 is about 883.6545429515.

The spelling of 689997542 in words is "six hundred eighty-nine million, nine hundred ninety-seven thousand, five hundred forty-two".