74853721 has 4 divisors (see below), whose sum is σ = 74933712. Its totient is φ = 74773732.

The previous prime is 74853719. The next prime is 74853731. The reversal of 74853721 is 12735847.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74853721 - 2¹ = 74853719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74853731) 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, 38575 + ... + 40468.

It is an arithmetic number, because the mean of its divisors is an integer number (18733428).

Almost surely, 2^74853721 is an apocalyptic number.

It is an amenable number.

74853721 is a deficient number, since it is larger than the sum of its proper divisors (79991).

74853721 is an equidigital number, since it uses as much as digits as its factorization.

74853721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79990.

The product of its digits is 47040, while the sum is 37.

The square root of 74853721 is about 8651.8044938614. The cubic root of 74853721 is about 421.4419842409.

The spelling of 74853721 in words is "seventy-four million, eight hundred fifty-three thousand, seven hundred twenty-one".