73139723 has 2 divisors, whose sum is σ = 73139724. Its totient is φ = 73139722.

The previous prime is 73139669. The next prime is 73139741. The reversal of 73139723 is 32793137.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73139723 - 2⁸ = 73139467 is a prime.

It is not a weakly prime, because it can be changed into another prime (73139753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36569861 + 36569862.

It is an arithmetic number, because the mean of its divisors is an integer number (36569862).

Almost surely, 2^73139723 is an apocalyptic number.

73139723 is a deficient number, since it is larger than the sum of its proper divisors (1).

73139723 is an equidigital number, since it uses as much as digits as its factorization.

73139723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 35.

The square root of 73139723 is about 8552.1765065976. The cubic root of 73139723 is about 418.2003934480.

The spelling of 73139723 in words is "seventy-three million, one hundred thirty-nine thousand, seven hundred twenty-three".