74903649 has 16 divisors (see below), whose sum is σ = 105986880. Its totient is φ = 46891520.

The previous prime is 74903639. The next prime is 74903687. The reversal of 74903649 is 94630947.

It is a cyclic number.

It is not a de Polignac number, because 74903649 - 2²⁰ = 73855073 is a prime.

It is a super-2 number, since 2×74903649² = 11221113267030402, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74903649.

It is not an unprimeable number, because it can be changed into a prime (74903629) 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 15 ways as a sum of consecutive naturals, for example, 25162 + ... + 27980.

It is an arithmetic number, because the mean of its divisors is an integer number (6624180).

Almost surely, 2^74903649 is an apocalyptic number.

It is an amenable number.

74903649 is a deficient number, since it is larger than the sum of its proper divisors (31083231).

74903649 is a wasteful number, since it uses less digits than its factorization.

74903649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 74903649 is about 8654.6894225038. The cubic root of 74903649 is about 421.5356650827.

The spelling of 74903649 in words is "seventy-four million, nine hundred three thousand, six hundred forty-nine".