74172313 has 2 divisors, whose sum is σ = 74172314. Its totient is φ = 74172312.

The previous prime is 74172299. The next prime is 74172317. The reversal of 74172313 is 31327147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61591104 + 12581209 = 7848^2 + 3547^2 .

It is a cyclic number.

It is not a de Polignac number, because 74172313 - 2²⁵ = 40617881 is a prime.

It is not a weakly prime, because it can be changed into another prime (74172317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37086156 + 37086157.

It is an arithmetic number, because the mean of its divisors is an integer number (37086157).

Almost surely, 2^74172313 is an apocalyptic number.

It is an amenable number.

74172313 is a deficient number, since it is larger than the sum of its proper divisors (1).

74172313 is an equidigital number, since it uses as much as digits as its factorization.

74172313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 28.

The square root of 74172313 is about 8612.3349331061. The cubic root of 74172313 is about 420.1592612191.

It can be divided in two parts, 7417 and 2313, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 74172313 in words is "seventy-four million, one hundred seventy-two thousand, three hundred thirteen".