39961863 has 16 divisors (see below), whose sum is σ = 59320800. Its totient is φ = 26588160.

The previous prime is 39961829. The next prime is 39961871. The reversal of 39961863 is 36816993.

It is not a de Polignac number, because 39961863 - 2¹² = 39957767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39961063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16153 + ... + 18461.

It is an arithmetic number, because the mean of its divisors is an integer number (3707550).

Almost surely, 2^39961863 is an apocalyptic number.

39961863 is a deficient number, since it is larger than the sum of its proper divisors (19358937).

39961863 is a wasteful number, since it uses less digits than its factorization.

39961863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959 (or 2953 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 39961863 is about 6321.5396067730. The cubic root of 39961863 is about 341.8864658537.

The spelling of 39961863 in words is "thirty-nine million, nine hundred sixty-one thousand, eight hundred sixty-three".