40630621 has 2 divisors, whose sum is σ = 40630622. Its totient is φ = 40630620.

The previous prime is 40630591. The next prime is 40630643. The reversal of 40630621 is 12603604.

It is an a-pointer prime, because the next prime (40630643) can be obtained adding 40630621 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29648025 + 10982596 = 5445^2 + 3314^2 .

It is a cyclic number.

It is not a de Polignac number, because 40630621 - 2⁵ = 40630589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40630592 and 40630601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40630651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20315310 + 20315311.

It is an arithmetic number, because the mean of its divisors is an integer number (20315311).

Almost surely, 2^40630621 is an apocalyptic number.

It is an amenable number.

40630621 is a deficient number, since it is larger than the sum of its proper divisors (1).

40630621 is an equidigital number, since it uses as much as digits as its factorization.

40630621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40630621 is about 6374.2153242576. The cubic root of 40630621 is about 343.7830709340.

The spelling of 40630621 in words is "forty million, six hundred thirty thousand, six hundred twenty-one".