44657621 has 2 divisors, whose sum is σ = 44657622. Its totient is φ = 44657620.

The previous prime is 44657617. The next prime is 44657629. The reversal of 44657621 is 12675644.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31516996 + 13140625 = 5614^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 44657621 - 2² = 44657617 is a prime.

It is a super-2 number, since 2×44657621² = 3988606226759282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44657629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22328810 + 22328811.

It is an arithmetic number, because the mean of its divisors is an integer number (22328811).

Almost surely, 2^44657621 is an apocalyptic number.

It is an amenable number.

44657621 is a deficient number, since it is larger than the sum of its proper divisors (1).

44657621 is an equidigital number, since it uses as much as digits as its factorization.

44657621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 35.

The square root of 44657621 is about 6682.6357823841. The cubic root of 44657621 is about 354.7849547301.

The spelling of 44657621 in words is "forty-four million, six hundred fifty-seven thousand, six hundred twenty-one".