3981956199 has 12 divisors (see below), whose sum is σ = 5749097256. Its totient is φ = 2450434272.

The previous prime is 3981956129. The next prime is 3981956249. The reversal of 3981956199 is 9916591893.

It is not a de Polignac number, because 3981956199 - 2¹³ = 3981948007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981956129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3926472 + ... + 3927485.

It is an arithmetic number, because the mean of its divisors is an integer number (479091438).

Almost surely, 2^3981956199 is an apocalyptic number.

3981956199 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

3981956199 is a deficient number, since it is larger than the sum of its proper divisors (1767141057).

3981956199 is a wasteful number, since it uses less digits than its factorization.

3981956199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7853986 (or 7853973 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 60.

The square root of 3981956199 is about 63102.7431971067. The cubic root of 3981956199 is about 1585.0105581666.

The spelling of 3981956199 in words is "three billion, nine hundred eighty-one million, nine hundred fifty-six thousand, one hundred ninety-nine".