74846921 has 4 divisors (see below), whose sum is σ = 75533700. Its totient is φ = 74160144.

The previous prime is 74846897. The next prime is 74846929. The reversal of 74846921 is 12964847.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22848400 + 51998521 = 4780^2 + 7211^2 .

It is a cyclic number.

It is not a de Polignac number, because 74846921 - 2¹⁴ = 74830537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74846929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343226 + ... + 343443.

It is an arithmetic number, because the mean of its divisors is an integer number (18883425).

Almost surely, 2^74846921 is an apocalyptic number.

It is an amenable number.

74846921 is a deficient number, since it is larger than the sum of its proper divisors (686779).

74846921 is a wasteful number, since it uses less digits than its factorization.

74846921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686778.

The product of its digits is 96768, while the sum is 41.

The square root of 74846921 is about 8651.4115033329. The cubic root of 74846921 is about 421.4292220507.

The spelling of 74846921 in words is "seventy-four million, eight hundred forty-six thousand, nine hundred twenty-one".