74669921 has 8 divisors (see below), whose sum is σ = 75874344. Its totient is φ = 73474560.

The previous prime is 74669879. The next prime is 74669923. The reversal of 74669921 is 12996647.

It can be written as a sum of positive squares in 4 ways, for example, as 3013696 + 71656225 = 1736^2 + 8465^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74669921 - 2¹⁰ = 74668897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74669923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15431 + ... + 19683.

It is an arithmetic number, because the mean of its divisors is an integer number (9484293).

Almost surely, 2^74669921 is an apocalyptic number.

It is an amenable number.

74669921 is a deficient number, since it is larger than the sum of its proper divisors (1204423).

74669921 is a wasteful number, since it uses less digits than its factorization.

74669921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4531.

The product of its digits is 163296, while the sum is 44.

The square root of 74669921 is about 8641.1759037761. The cubic root of 74669921 is about 421.0967574750.

The spelling of 74669921 in words is "seventy-four million, six hundred sixty-nine thousand, nine hundred twenty-one".