74385137 has 2 divisors, whose sum is σ = 74385138. Its totient is φ = 74385136.

The previous prime is 74385119. The next prime is 74385139. The reversal of 74385137 is 73158347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67749361 + 6635776 = 8231^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 74385137 - 2⁸ = 74384881 is a prime.

Together with 74385139, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74385137.

It is not a weakly prime, because it can be changed into another prime (74385139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37192568 + 37192569.

It is an arithmetic number, because the mean of its divisors is an integer number (37192569).

Almost surely, 2^74385137 is an apocalyptic number.

It is an amenable number.

74385137 is a deficient number, since it is larger than the sum of its proper divisors (1).

74385137 is an equidigital number, since it uses as much as digits as its factorization.

74385137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 74385137 is about 8624.6818492046. The cubic root of 74385137 is about 420.5607344116.

The spelling of 74385137 in words is "seventy-four million, three hundred eighty-five thousand, one hundred thirty-seven".