73131641 has 4 divisors (see below), whose sum is σ = 79779984. Its totient is φ = 66483300.

The previous prime is 73131631. The next prime is 73131677. The reversal of 73131641 is 14613137.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73131641 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 73131641.

It is not an unprimeable number, because it can be changed into a prime (73131631) 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, 3324155 + ... + 3324176.

It is an arithmetic number, because the mean of its divisors is an integer number (19944996).

Almost surely, 2^73131641 is an apocalyptic number.

It is an amenable number.

73131641 is a deficient number, since it is larger than the sum of its proper divisors (6648343).

73131641 is a wasteful number, since it uses less digits than its factorization.

73131641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648342.

The product of its digits is 1512, while the sum is 26.

The square root of 73131641 is about 8551.7039822482. The cubic root of 73131641 is about 418.1849890505.

Adding to 73131641 its reverse (14613137), we get a palindrome (87744778).

The spelling of 73131641 in words is "seventy-three million, one hundred thirty-one thousand, six hundred forty-one".