74629921 has 2 divisors, whose sum is σ = 74629922. Its totient is φ = 74629920.

The previous prime is 74629913. The next prime is 74629931. The reversal of 74629921 is 12992647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 34939921 = 6300^2 + 5911^2 .

It is a cyclic number.

It is not a de Polignac number, because 74629921 - 2³ = 74629913 is a prime.

It is a super-3 number, since 3×74629921³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (74629931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37314960 + 37314961.

It is an arithmetic number, because the mean of its divisors is an integer number (37314961).

Almost surely, 2^74629921 is an apocalyptic number.

It is an amenable number.

74629921 is a deficient number, since it is larger than the sum of its proper divisors (1).

74629921 is an equidigital number, since it uses as much as digits as its factorization.

74629921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 74629921 is about 8638.8610939174. The cubic root of 74629921 is about 421.0215514720.

The spelling of 74629921 in words is "seventy-four million, six hundred twenty-nine thousand, nine hundred twenty-one".