39745723 has 4 divisors (see below), whose sum is σ = 39766888. Its totient is φ = 39724560.

The previous prime is 39745721. The next prime is 39745781. The reversal of 39745723 is 32754793.

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

It is a cyclic number.

It is not a de Polignac number, because 39745723 - 2¹ = 39745721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39745721) 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, 7458 + ... + 11623.

It is an arithmetic number, because the mean of its divisors is an integer number (9941722).

Almost surely, 2^39745723 is an apocalyptic number.

39745723 is a deficient number, since it is larger than the sum of its proper divisors (21165).

39745723 is a wasteful number, since it uses less digits than its factorization.

39745723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21164.

The product of its digits is 158760, while the sum is 40.

The square root of 39745723 is about 6304.4209091716. The cubic root of 39745723 is about 341.2689690556.

The spelling of 39745723 in words is "thirty-nine million, seven hundred forty-five thousand, seven hundred twenty-three".