64650393 has 12 divisors (see below), whose sum is σ = 96842928. Its totient is φ = 43100100.

The previous prime is 64650389. The next prime is 64650409. The reversal of 64650393 is 39305646.

64650393 is a `hidden beast` number, since 64 + 6 + 503 + 93 = 666.

It is not a de Polignac number, because 64650393 - 2² = 64650389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64650373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132783 + ... + 133268.

It is an arithmetic number, because the mean of its divisors is an integer number (8070244).

Almost surely, 2^64650393 is an apocalyptic number.

It is an amenable number.

64650393 is a deficient number, since it is larger than the sum of its proper divisors (32192535).

64650393 is an equidigital number, since it uses as much as digits as its factorization.

64650393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266066 (or 266054 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 64650393 is about 8040.5468097636. The cubic root of 64650393 is about 401.3504211926.

The spelling of 64650393 in words is "sixty-four million, six hundred fifty thousand, three hundred ninety-three".