73123931 has 2 divisors, whose sum is σ = 73123932. Its totient is φ = 73123930.

The previous prime is 73123927. The next prime is 73123937. The reversal of 73123931 is 13932137.

It is a weak prime.

It is an emirp because it is prime and its reverse (13932137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73123931 - 2² = 73123927 is a prime.

It is a super-2 number, since 2×73123931² = 10694218569785522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73123894 and 73123903.

It is not a weakly prime, because it can be changed into another prime (73123937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36561965 + 36561966.

It is an arithmetic number, because the mean of its divisors is an integer number (36561966).

Almost surely, 2^73123931 is an apocalyptic number.

73123931 is a deficient number, since it is larger than the sum of its proper divisors (1).

73123931 is an equidigital number, since it uses as much as digits as its factorization.

73123931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 29.

The square root of 73123931 is about 8551.2531830136. The cubic root of 73123931 is about 418.1702926322.

The spelling of 73123931 in words is "seventy-three million, one hundred twenty-three thousand, nine hundred thirty-one".