74439137 has 2 divisors, whose sum is σ = 74439138. Its totient is φ = 74439136.

The previous prime is 74439133. The next prime is 74439161. The reversal of 74439137 is 73193447.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68293696 + 6145441 = 8264^2 + 2479^2 .

It is an emirp because it is prime and its reverse (73193447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74439137 - 2² = 74439133 is a prime.

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 74439137.

It is not a weakly prime, because it can be changed into another prime (74439133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37219568 + 37219569.

It is an arithmetic number, because the mean of its divisors is an integer number (37219569).

Almost surely, 2^74439137 is an apocalyptic number.

It is an amenable number.

74439137 is a deficient number, since it is larger than the sum of its proper divisors (1).

74439137 is an equidigital number, since it uses as much as digits as its factorization.

74439137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 74439137 is about 8627.8118315132. The cubic root of 74439137 is about 420.6624786904.

The spelling of 74439137 in words is "seventy-four million, four hundred thirty-nine thousand, one hundred thirty-seven".