39445723 has 2 divisors, whose sum is σ = 39445724. Its totient is φ = 39445722.

The previous prime is 39445709. The next prime is 39445739. The reversal of 39445723 is 32754493.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39445723 is a prime.

It is not a weakly prime, because it can be changed into another prime (39445753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19722861 + 19722862.

It is an arithmetic number, because the mean of its divisors is an integer number (19722862).

Almost surely, 2^39445723 is an apocalyptic number.

39445723 is a deficient number, since it is larger than the sum of its proper divisors (1).

39445723 is an equidigital number, since it uses as much as digits as its factorization.

39445723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 39445723 is about 6280.5830143387. The cubic root of 39445723 is about 340.4081689679.

The spelling of 39445723 in words is "thirty-nine million, four hundred forty-five thousand, seven hundred twenty-three".