64920463 has 2 divisors, whose sum is σ = 64920464. Its totient is φ = 64920462.

The previous prime is 64920437. The next prime is 64920491. The reversal of 64920463 is 36402946.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64920463 is a prime.

It is a super-2 number, since 2×64920463² = 8429333032268738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64920403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32460231 + 32460232.

It is an arithmetic number, because the mean of its divisors is an integer number (32460232).

Almost surely, 2^64920463 is an apocalyptic number.

64920463 is a deficient number, since it is larger than the sum of its proper divisors (1).

64920463 is an equidigital number, since it uses as much as digits as its factorization.

64920463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 64920463 is about 8057.3235630698. The cubic root of 64920463 is about 401.9085107345.

It can be divided in two parts, 649 and 20463, that added together give a palindrome (21112).

The spelling of 64920463 in words is "sixty-four million, nine hundred twenty thousand, four hundred sixty-three".