3920199987 has 24 divisors (see below), whose sum is σ = 5900605648. Its totient is φ = 2311657920.

The previous prime is 3920199901. The next prime is 3920199991. The reversal of 3920199987 is 7899910293.

It is not a de Polignac number, because 3920199987 - 2⁷ = 3920199859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3920199887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132508 + ... + 159369.

Almost surely, 2^3920199987 is an apocalyptic number.

3920199987 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3920199987 is a deficient number, since it is larger than the sum of its proper divisors (1980405661).

3920199987 is a wasteful number, since it uses less digits than its factorization.

3920199987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291939 (or 291928 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 3920199987 is about 62611.5004372200. The cubic root of 3920199987 is about 1576.7738458478.

The spelling of 3920199987 in words is "three billion, nine hundred twenty million, one hundred ninety-nine thousand, nine hundred eighty-seven".