3937862981 has 4 divisors (see below), whose sum is σ = 4240775532. Its totient is φ = 3634950432.

The previous prime is 3937862927. The next prime is 3937863023. The reversal of 3937862981 is 1892687393.

3937862981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2406393025 + 1531469956 = 49055^2 + 39134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3937862981 is a prime.

It is a super-2 number, since 2×3937862981² = 31013529714260412722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3937862921) 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, 151456256 + ... + 151456281.

It is an arithmetic number, because the mean of its divisors is an integer number (1060193883).

Almost surely, 2^3937862981 is an apocalyptic number.

It is an amenable number.

3937862981 is a deficient number, since it is larger than the sum of its proper divisors (302912551).

3937862981 is a wasteful number, since it uses less digits than its factorization.

3937862981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302912550.

The product of its digits is 3919104, while the sum is 56.

The square root of 3937862981 is about 62752.3942252405. The cubic root of 3937862981 is about 1579.1384210665.

The spelling of 3937862981 in words is "three billion, nine hundred thirty-seven million, eight hundred sixty-two thousand, nine hundred eighty-one".