64916943 has 16 divisors (see below), whose sum is σ = 106530816. Its totient is φ = 34241760.

The previous prime is 64916923. The next prime is 64916983. The reversal of 64916943 is 34961946.

It is not a de Polignac number, because 64916943 - 2⁵ = 64916911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64916895 and 64916904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64916923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118623 + ... + 119168.

It is an arithmetic number, because the mean of its divisors is an integer number (6658176).

Almost surely, 2^64916943 is an apocalyptic number.

64916943 is a deficient number, since it is larger than the sum of its proper divisors (41613873).

64916943 is a wasteful number, since it uses less digits than its factorization.

64916943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237814.

The product of its digits is 139968, while the sum is 42.

The square root of 64916943 is about 8057.1051252916. The cubic root of 64916943 is about 401.9012467509.

The spelling of 64916943 in words is "sixty-four million, nine hundred sixteen thousand, nine hundred forty-three".