39990111 has 16 divisors (see below), whose sum is σ = 61797888. Its totient is φ = 22528800.

The previous prime is 39990109. The next prime is 39990113. The reversal of 39990111 is 11109993.

It is an interprime number because it is at equal distance from previous prime (39990109) and next prime (39990113).

It is not a de Polignac number, because 39990111 - 2¹ = 39990109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39990113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11920 + ... + 14901.

It is an arithmetic number, because the mean of its divisors is an integer number (3862368).

Almost surely, 2^39990111 is an apocalyptic number.

39990111 is a deficient number, since it is larger than the sum of its proper divisors (21807777).

39990111 is a wasteful number, since it uses less digits than its factorization.

39990111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26902.

The product of its (nonzero) digits is 2187, while the sum is 33.

The square root of 39990111 is about 6323.7734779165. The cubic root of 39990111 is about 341.9670037589.

The spelling of 39990111 in words is "thirty-nine million, nine hundred ninety thousand, one hundred eleven".