74907289 has 2 divisors, whose sum is σ = 74907290. Its totient is φ = 74907288.

The previous prime is 74907233. The next prime is 74907293. The reversal of 74907289 is 98270947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66145689 + 8761600 = 8133^2 + 2960^2 .

It is an emirp because it is prime and its reverse (98270947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74907289 - 2¹¹ = 74905241 is a prime.

It is a super-2 number, since 2×74907289² = 11222203890659042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74907229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37453644 + 37453645.

It is an arithmetic number, because the mean of its divisors is an integer number (37453645).

Almost surely, 2^74907289 is an apocalyptic number.

It is an amenable number.

74907289 is a deficient number, since it is larger than the sum of its proper divisors (1).

74907289 is an equidigital number, since it uses as much as digits as its factorization.

74907289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 74907289 is about 8654.8997105686. The cubic root of 74907289 is about 421.5424932546.

The spelling of 74907289 in words is "seventy-four million, nine hundred seven thousand, two hundred eighty-nine".