39990051 has 8 divisors (see below), whose sum is σ = 59244560. Its totient is φ = 26660016.

The previous prime is 39990019. The next prime is 39990107. The reversal of 39990051 is 15009993.

It is not a de Polignac number, because 39990051 - 2⁵ = 39990019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39989988 and 39990015.

It is not an unprimeable number, because it can be changed into a prime (39990011) 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 7 ways as a sum of consecutive naturals, for example, 740530 + ... + 740583.

It is an arithmetic number, because the mean of its divisors is an integer number (7405570).

Almost surely, 2^39990051 is an apocalyptic number.

39990051 is a deficient number, since it is larger than the sum of its proper divisors (19254509).

39990051 is a wasteful number, since it uses less digits than its factorization.

39990051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481122 (or 1481116 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The square root of 39990051 is about 6323.7687339118. The cubic root of 39990051 is about 341.9668327331.

The spelling of 39990051 in words is "thirty-nine million, nine hundred ninety thousand, fifty-one".