74677621 has 2 divisors, whose sum is σ = 74677622. Its totient is φ = 74677620.

The previous prime is 74677607. The next prime is 74677637. The reversal of 74677621 is 12677647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37638225 + 37039396 = 6135^2 + 6086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74677621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74677661) 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, 37338810 + 37338811.

It is an arithmetic number, because the mean of its divisors is an integer number (37338811).

Almost surely, 2^74677621 is an apocalyptic number.

It is an amenable number.

74677621 is a deficient number, since it is larger than the sum of its proper divisors (1).

74677621 is an equidigital number, since it uses as much as digits as its factorization.

74677621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 40.

The square root of 74677621 is about 8641.6214335042. The cubic root of 74677621 is about 421.1112315476. Note that the first 3 decimals are identical.

The spelling of 74677621 in words is "seventy-four million, six hundred seventy-seven thousand, six hundred twenty-one".