73901621 has 8 divisors (see below), whose sum is σ = 78244320. Its totient is φ = 69604272.

The previous prime is 73901591. The next prime is 73901629. The reversal of 73901621 is 12610937.

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 73901621 - 2¹⁰ = 73900597 is a prime.

It is a super-2 number, since 2×73901621² = 10922899172855282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73901629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7955 + ... + 14528.

It is an arithmetic number, because the mean of its divisors is an integer number (9780540).

Almost surely, 2^73901621 is an apocalyptic number.

It is an amenable number.

73901621 is a deficient number, since it is larger than the sum of its proper divisors (4342699).

73901621 is a wasteful number, since it uses less digits than its factorization.

73901621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22675.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 73901621 is about 8596.6052020551. The cubic root of 73901621 is about 419.6475141600.

The spelling of 73901621 in words is "seventy-three million, nine hundred one thousand, six hundred twenty-one".