73413991 has 4 divisors (see below), whose sum is σ = 83901712. Its totient is φ = 62926272.

The previous prime is 73413979. The next prime is 73414009. The reversal of 73413991 is 19931437.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19931437 = 19 ⋅1049023.

It is a cyclic number.

It is not a de Polignac number, because 73413991 - 2⁵ = 73413959 is a prime.

It is a super-2 number, since 2×73413991² = 10779228149096162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73413991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73413911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5243850 + ... + 5243863.

It is an arithmetic number, because the mean of its divisors is an integer number (20975428).

Almost surely, 2^73413991 is an apocalyptic number.

73413991 is a deficient number, since it is larger than the sum of its proper divisors (10487721).

73413991 is a wasteful number, since it uses less digits than its factorization.

73413991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10487720.

The product of its digits is 20412, while the sum is 37.

The square root of 73413991 is about 8568.1964846752. The cubic root of 73413991 is about 418.7224805261.

The spelling of 73413991 in words is "seventy-three million, four hundred thirteen thousand, nine hundred ninety-one".