73126731 has 4 divisors (see below), whose sum is σ = 97502312. Its totient is φ = 48751152.

The previous prime is 73126723. The next prime is 73126747. The reversal of 73126731 is 13762137.

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

It is not a de Polignac number, because 73126731 - 2³ = 73126723 is a prime.

It is a super-2 number, since 2×73126731² = 10695037573492722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73126721) 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, 12187786 + ... + 12187791.

It is an arithmetic number, because the mean of its divisors is an integer number (24375578).

Almost surely, 2^73126731 is an apocalyptic number.

73126731 is a deficient number, since it is larger than the sum of its proper divisors (24375581).

73126731 is a wasteful number, since it uses less digits than its factorization.

73126731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24375580.

The product of its digits is 5292, while the sum is 30.

The square root of 73126731 is about 8551.4169001400. The cubic root of 73126731 is about 418.1756299723.

Adding to 73126731 its reverse (13762137), we get a palindrome (86888868).

The spelling of 73126731 in words is "seventy-three million, one hundred twenty-six thousand, seven hundred thirty-one".