64709523 has 20 divisors (see below), whose sum is σ = 97042968. Its totient is φ = 42971040.

The previous prime is 64709479. The next prime is 64709537. The reversal of 64709523 is 32590746.

64709523 is a `hidden beast` number, since 64 + 70 + 9 + 523 = 666.

It is not a de Polignac number, because 64709523 - 2¹² = 64705427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64709923) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21340 + ... + 24182.

Almost surely, 2^64709523 is an apocalyptic number.

64709523 is a deficient number, since it is larger than the sum of its proper divisors (32333445).

64709523 is a wasteful number, since it uses less digits than its factorization.

64709523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136 (or 3127 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 64709523 is about 8044.2229581234. Note that the first 3 decimals coincide. The cubic root of 64709523 is about 401.4727438258.

The spelling of 64709523 in words is "sixty-four million, seven hundred nine thousand, five hundred twenty-three".