74939489 has 2 divisors, whose sum is σ = 74939490. Its totient is φ = 74939488.

The previous prime is 74939461. The next prime is 74939521. The reversal of 74939489 is 98493947.

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., 72931600 + 2007889 = 8540^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 74939489 - 2⁸ = 74939233 is a prime.

It is a super-2 number, since 2×74939489² = 11231854023162242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74939489.

It is not a weakly prime, because it can be changed into another prime (74939089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37469744 + 37469745.

It is an arithmetic number, because the mean of its divisors is an integer number (37469745).

Almost surely, 2^74939489 is an apocalyptic number.

It is an amenable number.

74939489 is a deficient number, since it is larger than the sum of its proper divisors (1).

74939489 is an equidigital number, since it uses as much as digits as its factorization.

74939489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The square root of 74939489 is about 8656.7597286745. The cubic root of 74939489 is about 421.6028866821.

The spelling of 74939489 in words is "seventy-four million, nine hundred thirty-nine thousand, four hundred eighty-nine".