39872949 has 4 divisors (see below), whose sum is σ = 53163936. Its totient is φ = 26581964.

The previous prime is 39872947. The next prime is 39872957. The reversal of 39872949 is 94927893.

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.

It is a cyclic number.

It is not a de Polignac number, because 39872949 - 2¹ = 39872947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39872947) 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, 6645489 + ... + 6645494.

It is an arithmetic number, because the mean of its divisors is an integer number (13290984).

Almost surely, 2^39872949 is an apocalyptic number.

It is an amenable number.

39872949 is a deficient number, since it is larger than the sum of its proper divisors (13290987).

39872949 is a wasteful number, since it uses less digits than its factorization.

39872949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13290986.

The product of its digits is 979776, while the sum is 51.

The square root of 39872949 is about 6314.5030683340. The cubic root of 39872949 is about 341.6327150347.

The spelling of 39872949 in words is "thirty-nine million, eight hundred seventy-two thousand, nine hundred forty-nine".