39745903 has 4 divisors (see below), whose sum is σ = 39831480. Its totient is φ = 39660328.

The previous prime is 39745897. The next prime is 39745913. The reversal of 39745903 is 30954793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30954793 = 71 ⋅435983.

It is a cyclic number.

It is not a de Polignac number, because 39745903 - 2¹⁷ = 39614831 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39745913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42088 + ... + 43021.

It is an arithmetic number, because the mean of its divisors is an integer number (9957870).

Almost surely, 2^39745903 is an apocalyptic number.

39745903 is a deficient number, since it is larger than the sum of its proper divisors (85577).

39745903 is an equidigital number, since it uses as much as digits as its factorization.

39745903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85576.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 39745903 is about 6304.4351848520. The cubic root of 39745903 is about 341.2694842332.

The spelling of 39745903 in words is "thirty-nine million, seven hundred forty-five thousand, nine hundred three".