39985051 has 4 divisors (see below), whose sum is σ = 40016952. Its totient is φ = 39953152.

The previous prime is 39985039. The next prime is 39985079. The reversal of 39985051 is 15058993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39985051 - 2⁵ = 39985019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39984995 and 39985013.

It is not an unprimeable number, because it can be changed into a prime (39985081) 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, 13990 + ... + 16603.

It is an arithmetic number, because the mean of its divisors is an integer number (10004238).

Almost surely, 2^39985051 is an apocalyptic number.

39985051 is a deficient number, since it is larger than the sum of its proper divisors (31901).

39985051 is a wasteful number, since it uses less digits than its factorization.

39985051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31900.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 39985051 is about 6323.3733876784. The cubic root of 39985051 is about 341.9525799761.

The spelling of 39985051 in words is "thirty-nine million, nine hundred eighty-five thousand, fifty-one".