73724991 has 8 divisors (see below), whose sum is σ = 99767424. Its totient is φ = 48416280.

The previous prime is 73724983. The next prime is 73724993. The reversal of 73724991 is 19942737.

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

It is not a de Polignac number, because 73724991 - 2³ = 73724983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73724993) 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, 183195 + ... + 183596.

It is an arithmetic number, because the mean of its divisors is an integer number (12470928).

Almost surely, 2^73724991 is an apocalyptic number.

73724991 is a deficient number, since it is larger than the sum of its proper divisors (26042433).

73724991 is a wasteful number, since it uses less digits than its factorization.

73724991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366861.

The product of its digits is 95256, while the sum is 42.

The square root of 73724991 is about 8586.3258149222. The cubic root of 73724991 is about 419.3129185609.

The spelling of 73724991 in words is "seventy-three million, seven hundred twenty-four thousand, nine hundred ninety-one".