73457147 has 4 divisors (see below), whose sum is σ = 76650960. Its totient is φ = 70263336.

The previous prime is 73457113. The next prime is 73457159. The reversal of 73457147 is 74175437.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73457147 - 2²⁰ = 72408571 is a prime.

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 73457147.

It is not an unprimeable number, because it can be changed into a prime (73457347) 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, 1596872 + ... + 1596917.

It is an arithmetic number, because the mean of its divisors is an integer number (19162740).

Almost surely, 2^73457147 is an apocalyptic number.

73457147 is a deficient number, since it is larger than the sum of its proper divisors (3193813).

73457147 is a wasteful number, since it uses less digits than its factorization.

73457147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193812.

The product of its digits is 82320, while the sum is 38.

The square root of 73457147 is about 8570.7144976367. The cubic root of 73457147 is about 418.8045123360.

The spelling of 73457147 in words is "seventy-three million, four hundred fifty-seven thousand, one hundred forty-seven".