74131537 has 2 divisors, whose sum is σ = 74131538. Its totient is φ = 74131536.

The previous prime is 74131517. The next prime is 74131583. The reversal of 74131537 is 73513147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49688401 + 24443136 = 7049^2 + 4944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74131537 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74131499 and 74131508.

It is not a weakly prime, because it can be changed into another prime (74131517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37065768 + 37065769.

It is an arithmetic number, because the mean of its divisors is an integer number (37065769).

Almost surely, 2^74131537 is an apocalyptic number.

It is an amenable number.

74131537 is a deficient number, since it is larger than the sum of its proper divisors (1).

74131537 is an equidigital number, since it uses as much as digits as its factorization.

74131537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 31.

The square root of 74131537 is about 8609.9673053967. The cubic root of 74131537 is about 420.0822533537.

The spelling of 74131537 in words is "seventy-four million, one hundred thirty-one thousand, five hundred thirty-seven".