39748749 has 4 divisors (see below), whose sum is σ = 52998336. Its totient is φ = 26499164.

The previous prime is 39748747. The next prime is 39748799. The reversal of 39748749 is 94784793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94784793 = 3 ⋅31594931.

It is a cyclic number.

It is not a de Polignac number, because 39748749 - 2¹ = 39748747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39748747) 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, 6624789 + ... + 6624794.

It is an arithmetic number, because the mean of its divisors is an integer number (13249584).

Almost surely, 2^39748749 is an apocalyptic number.

It is an amenable number.

39748749 is a deficient number, since it is larger than the sum of its proper divisors (13249587).

39748749 is a wasteful number, since it uses less digits than its factorization.

39748749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13249586.

The product of its digits is 1524096, while the sum is 51.

The square root of 39748749 is about 6304.6608949253. The cubic root of 39748749 is about 341.2776295572.

The spelling of 39748749 in words is "thirty-nine million, seven hundred forty-eight thousand, seven hundred forty-nine".