74626621 has 2 divisors, whose sum is σ = 74626622. Its totient is φ = 74626620.

The previous prime is 74626619. The next prime is 74626633. The reversal of 74626621 is 12662647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47472100 + 27154521 = 6890^2 + 5211^2 .

It is a cyclic number.

It is not a de Polignac number, because 74626621 - 2¹ = 74626619 is a prime.

Together with 74626619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74621621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37313310 + 37313311.

It is an arithmetic number, because the mean of its divisors is an integer number (37313311).

Almost surely, 2^74626621 is an apocalyptic number.

It is an amenable number.

74626621 is a deficient number, since it is larger than the sum of its proper divisors (1).

74626621 is an equidigital number, since it uses as much as digits as its factorization.

74626621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 74626621 is about 8638.6700944069. The cubic root of 74626621 is about 421.0153457770.

The spelling of 74626621 in words is "seventy-four million, six hundred twenty-six thousand, six hundred twenty-one".