39977121 has 16 divisors (see below), whose sum is σ = 56347200. Its totient is φ = 25141248.

The previous prime is 39977117. The next prime is 39977129. The reversal of 39977121 is 12177993.

It is not a de Polignac number, because 39977121 - 2² = 39977117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39977121.

It is not an unprimeable number, because it can be changed into a prime (39977129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13285 + ... + 16013.

It is an arithmetic number, because the mean of its divisors is an integer number (3521700).

Almost surely, 2^39977121 is an apocalyptic number.

It is an amenable number.

39977121 is a deficient number, since it is larger than the sum of its proper divisors (16370079).

39977121 is a wasteful number, since it uses less digits than its factorization.

39977121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008.

The product of its digits is 23814, while the sum is 39.

The square root of 39977121 is about 6322.7463178590. The cubic root of 39977121 is about 341.9299726669.

The spelling of 39977121 in words is "thirty-nine million, nine hundred seventy-seven thousand, one hundred twenty-one".