40627621 has 2 divisors, whose sum is σ = 40627622. Its totient is φ = 40627620.

The previous prime is 40627619. The next prime is 40627633. The reversal of 40627621 is 12672604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21390625 + 19236996 = 4625^2 + 4386^2 .

It is a cyclic number.

It is not a de Polignac number, because 40627621 - 2¹ = 40627619 is a prime.

Together with 40627619, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40627621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40627121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20313810 + 20313811.

It is an arithmetic number, because the mean of its divisors is an integer number (20313811).

Almost surely, 2^40627621 is an apocalyptic number.

It is an amenable number.

40627621 is a deficient number, since it is larger than the sum of its proper divisors (1).

40627621 is an equidigital number, since it uses as much as digits as its factorization.

40627621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 40627621 is about 6373.9799968309. The cubic root of 40627621 is about 343.7746095439.

The spelling of 40627621 in words is "forty million, six hundred twenty-seven thousand, six hundred twenty-one".