74308993921 has 8 divisors (see below), whose sum is σ = 74489022720. Its totient is φ = 74129069808.

The previous prime is 74308993909. The next prime is 74308993933. The reversal of 74308993921 is 12939980347.

It is an interprime number because it is at equal distance from previous prime (74308993909) and next prime (74308993933).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74308993921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74308393921) 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, 1502235 + ... + 1550911.

It is an arithmetic number, because the mean of its divisors is an integer number (9311127840).

Almost surely, 2^74308993921 is an apocalyptic number.

It is an amenable number.

74308993921 is a deficient number, since it is larger than the sum of its proper divisors (180028799).

74308993921 is a wasteful number, since it uses less digits than its factorization.

74308993921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52343.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 74308993921 in words is "seventy-four billion, three hundred eight million, nine hundred ninety-three thousand, nine hundred twenty-one".