73420139 has 8 divisors (see below), whose sum is σ = 79157232. Its totient is φ = 67695840.

The previous prime is 73420079. The next prime is 73420147. The reversal of 73420139 is 93102437.

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 73420139 - 2²⁴ = 56642923 is a prime.

It is a super-3 number, since 3×73420139³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73420169) 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, 11132 + ... + 16454.

It is an arithmetic number, because the mean of its divisors is an integer number (9894654).

Almost surely, 2^73420139 is an apocalyptic number.

73420139 is a deficient number, since it is larger than the sum of its proper divisors (5737093).

73420139 is a wasteful number, since it uses less digits than its factorization.

73420139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6397.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 73420139 is about 8568.5552457809. Note that the first 3 decimals coincide. The cubic root of 73420139 is about 418.7341687339.

The spelling of 73420139 in words is "seventy-three million, four hundred twenty thousand, one hundred thirty-nine".