74129917 has 2 divisors, whose sum is σ = 74129918. Its totient is φ = 74129916.

The previous prime is 74129863. The next prime is 74129929. The reversal of 74129917 is 71992147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52794756 + 21335161 = 7266^2 + 4619^2 .

It is a cyclic number.

It is not a de Polignac number, because 74129917 - 2²³ = 65741309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74129917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74129617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37064958 + 37064959.

It is an arithmetic number, because the mean of its divisors is an integer number (37064959).

Almost surely, 2^74129917 is an apocalyptic number.

It is an amenable number.

74129917 is a deficient number, since it is larger than the sum of its proper divisors (1).

74129917 is an equidigital number, since it uses as much as digits as its factorization.

74129917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 74129917 is about 8609.8732278704. The cubic root of 74129917 is about 420.0791933056.

The spelling of 74129917 in words is "seventy-four million, one hundred twenty-nine thousand, nine hundred seventeen".