64923871 has 8 divisors (see below), whose sum is σ = 68759424. Its totient is φ = 61172760.

The previous prime is 64923857. The next prime is 64923877. The reversal of 64923871 is 17832946.

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

It is a cyclic number.

It is not a de Polignac number, because 64923871 - 2¹³ = 64915679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64923877) 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, 19525 + ... + 22606.

It is an arithmetic number, because the mean of its divisors is an integer number (8594928).

Almost surely, 2^64923871 is an apocalyptic number.

64923871 is a deficient number, since it is larger than the sum of its proper divisors (3835553).

64923871 is a wasteful number, since it uses less digits than its factorization.

64923871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42221.

The product of its digits is 72576, while the sum is 40.

The square root of 64923871 is about 8057.5350449129. The cubic root of 64923871 is about 401.9155433411.

The spelling of 64923871 in words is "sixty-four million, nine hundred twenty-three thousand, eight hundred seventy-one".