64624949 has 2 divisors, whose sum is σ = 64624950. Its totient is φ = 64624948.

The previous prime is 64624943. The next prime is 64624993. The reversal of 64624949 is 94942646.

It is an a-pointer prime, because the next prime (64624993) can be obtained adding 64624949 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33466225 + 31158724 = 5785^2 + 5582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64624949 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64624943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32312474 + 32312475.

It is an arithmetic number, because the mean of its divisors is an integer number (32312475).

Almost surely, 2^64624949 is an apocalyptic number.

It is an amenable number.

64624949 is a deficient number, since it is larger than the sum of its proper divisors (1).

64624949 is an equidigital number, since it uses as much as digits as its factorization.

64624949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 44.

The square root of 64624949 is about 8038.9644233570. The cubic root of 64624949 is about 401.2977620639.

It can be divided in two parts, 6462 and 4949, that added together give a palindrome (11411).

The spelling of 64624949 in words is "sixty-four million, six hundred twenty-four thousand, nine hundred forty-nine".