74909537 has 2 divisors, whose sum is σ = 74909538. Its totient is φ = 74909536.

The previous prime is 74909509. The next prime is 74909543. The reversal of 74909537 is 73590947.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41165056 + 33744481 = 6416^2 + 5809^2 .

It is an emirp because it is prime and its reverse (73590947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74909537 - 2¹⁰ = 74908513 is a prime.

It is a super-2 number, since 2×74909537² = 11222877467108738, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74909557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37454768 + 37454769.

It is an arithmetic number, because the mean of its divisors is an integer number (37454769).

Almost surely, 2^74909537 is an apocalyptic number.

It is an amenable number.

74909537 is a deficient number, since it is larger than the sum of its proper divisors (1).

74909537 is an equidigital number, since it uses as much as digits as its factorization.

74909537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 74909537 is about 8655.0295782279. The cubic root of 74909537 is about 421.5467101030.

The spelling of 74909537 in words is "seventy-four million, nine hundred nine thousand, five hundred thirty-seven".