74172881 has 2 divisors, whose sum is σ = 74172882. Its totient is φ = 74172880.

The previous prime is 74172877. The next prime is 74172899. The reversal of 74172881 is 18827147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39891856 + 34281025 = 6316^2 + 5855^2 .

It is a cyclic number.

It is not a de Polignac number, because 74172881 - 2² = 74172877 is a prime.

It is a super-2 number, since 2×74172881² = 11003232551680322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74172821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37086440 + 37086441.

It is an arithmetic number, because the mean of its divisors is an integer number (37086441).

Almost surely, 2^74172881 is an apocalyptic number.

It is an amenable number.

74172881 is a deficient number, since it is larger than the sum of its proper divisors (1).

74172881 is an equidigital number, since it uses as much as digits as its factorization.

74172881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 38.

The square root of 74172881 is about 8612.3679090016. The cubic root of 74172881 is about 420.1603337211.

The spelling of 74172881 in words is "seventy-four million, one hundred seventy-two thousand, eight hundred eighty-one".