74973621 has 8 divisors (see below), whose sum is σ = 105845184. Its totient is φ = 47042240.

The previous prime is 74973617. The next prime is 74973631. The reversal of 74973621 is 12637947.

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 74973621 - 2² = 74973617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74973621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74973611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734985 + ... + 735086.

It is an arithmetic number, because the mean of its divisors is an integer number (13230648).

Almost surely, 2^74973621 is an apocalyptic number.

It is an amenable number.

74973621 is a deficient number, since it is larger than the sum of its proper divisors (30871563).

74973621 is a wasteful number, since it uses less digits than its factorization.

74973621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470091.

The product of its digits is 63504, while the sum is 39.

The square root of 74973621 is about 8658.7309116290. The cubic root of 74973621 is about 421.6668848303. Note that the first 3 decimals are identical.

The spelling of 74973621 in words is "seventy-four million, nine hundred seventy-three thousand, six hundred twenty-one".