690161532 has 24 divisors (see below), whose sum is σ = 1612136400. Its totient is φ = 229802496.

The previous prime is 690161497. The next prime is 690161543. The reversal of 690161532 is 235161096.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 690161493 and 690161502.

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, 19807 + ... + 42102.

It is an arithmetic number, because the mean of its divisors is an integer number (67172350).

Almost surely, 2^690161532 is an apocalyptic number.

It is an amenable number.

690161532 is an abundant number, since it is smaller than the sum of its proper divisors (921974868).

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

690161532 is a wasteful number, since it uses less digits than its factorization.

690161532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62845 (or 62843 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 690161532 is about 26270.9256022699. The cubic root of 690161532 is about 883.7245427321.

The spelling of 690161532 in words is "six hundred ninety million, one hundred sixty-one thousand, five hundred thirty-two".