74172269 has 2 divisors, whose sum is σ = 74172270. Its totient is φ = 74172268.

The previous prime is 74172247. The next prime is 74172277. The reversal of 74172269 is 96227147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60762025 + 13410244 = 7795^2 + 3662^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74172269 is a prime.

It is a super-2 number, since 2×74172269² = 11003050977216722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74172229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37086134 + 37086135.

It is an arithmetic number, because the mean of its divisors is an integer number (37086135).

Almost surely, 2^74172269 is an apocalyptic number.

It is an amenable number.

74172269 is a deficient number, since it is larger than the sum of its proper divisors (1).

74172269 is an equidigital number, since it uses as much as digits as its factorization.

74172269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 74172269 is about 8612.3323786301. The cubic root of 74172269 is about 420.1591781377.

The spelling of 74172269 in words is "seventy-four million, one hundred seventy-two thousand, two hundred sixty-nine".