74943649 has 9 divisors (see below), whose sum is σ = 82480881. Its totient is φ = 68044020.

The previous prime is 74943641. The next prime is 74943653. The reversal of 74943649 is 94634947.

The square root of 74943649 is 8657.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 74943649 - 2³ = 74943641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74943599 and 74943608.

It is not an unprimeable number, because it can be changed into a prime (74943641) 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 in 8 ways as a sum of consecutive naturals, for example, 94834 + ... + 95620.

Almost surely, 2^74943649 is an apocalyptic number.

74943649 is the 8657-th square number.

74943649 is the 4329-th centered octagonal number.

It is an amenable number.

74943649 is a deficient number, since it is larger than the sum of its proper divisors (7537232).

74943649 is an frugal number, since it uses more digits than its factorization.

74943649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 798 counting only the distinct ones).

The product of its digits is 653184, while the sum is 46.

The cubic root of 74943649 is about 421.6106878009.

The spelling of 74943649 in words is "seventy-four million, nine hundred forty-three thousand, six hundred forty-nine".