74402621 has 2 divisors, whose sum is σ = 74402622. Its totient is φ = 74402620.

The previous prime is 74402617. The next prime is 74402623. The reversal of 74402621 is 12620447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45091225 + 29311396 = 6715^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 74402621 - 2² = 74402617 is a prime.

Together with 74402623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74402623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37201310 + 37201311.

It is an arithmetic number, because the mean of its divisors is an integer number (37201311).

Almost surely, 2^74402621 is an apocalyptic number.

It is an amenable number.

74402621 is a deficient number, since it is larger than the sum of its proper divisors (1).

74402621 is an equidigital number, since it uses as much as digits as its factorization.

74402621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 74402621 is about 8625.6953922568. The cubic root of 74402621 is about 420.5936823371.

The spelling of 74402621 in words is "seventy-four million, four hundred two thousand, six hundred twenty-one".