690649053 has 8 divisors (see below), whose sum is σ = 922480416. Its totient is φ = 459625200.

The previous prime is 690649051. The next prime is 690649073. The reversal of 690649053 is 350946096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690649053 - 2¹ = 690649051 is a prime.

It is a super-2 number, since 2×690649053² = 953992228819593618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690648996 and 690649014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690649051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199878 + ... + 203303.

It is an arithmetic number, because the mean of its divisors is an integer number (115310052).

Almost surely, 2^690649053 is an apocalyptic number.

It is an amenable number.

690649053 is a deficient number, since it is larger than the sum of its proper divisors (231831363).

690649053 is a wasteful number, since it uses less digits than its factorization.

690649053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403755.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 690649053 is about 26280.2026818668. The cubic root of 690649053 is about 883.9325775411.

The spelling of 690649053 in words is "six hundred ninety million, six hundred forty-nine thousand, fifty-three".