74945981 has 8 divisors (see below), whose sum is σ = 82302528. Its totient is φ = 67680000.

The previous prime is 74945977. The next prime is 74946019. The reversal of 74945981 is 18954947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74945981 - 2² = 74945977 is a prime.

It is a super-2 number, since 2×74945981² = 11233800136104722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74945681) 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 in 7 ways as a sum of consecutive naturals, for example, 20900 + ... + 24221.

It is an arithmetic number, because the mean of its divisors is an integer number (10287816).

Almost surely, 2^74945981 is an apocalyptic number.

It is an amenable number.

74945981 is a deficient number, since it is larger than the sum of its proper divisors (7356547).

74945981 is a wasteful number, since it uses less digits than its factorization.

74945981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45283.

The product of its digits is 362880, while the sum is 47.

The square root of 74945981 is about 8657.1346876435. The cubic root of 74945981 is about 421.6150608017.

The spelling of 74945981 in words is "seventy-four million, nine hundred forty-five thousand, nine hundred eighty-one".