3957761971 has 4 divisors (see below), whose sum is σ = 4085431744. Its totient is φ = 3830092200.

The previous prime is 3957761963. The next prime is 3957761981. The reversal of 3957761971 is 1791677593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1791677593 = 211 ⋅8491363.

It is a cyclic number.

It is not a de Polignac number, because 3957761971 - 2³ = 3957761963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3957761981) 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, 63834840 + ... + 63834901.

It is an arithmetic number, because the mean of its divisors is an integer number (1021357936).

Almost surely, 2^3957761971 is an apocalyptic number.

3957761971 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3957761971 is a deficient number, since it is larger than the sum of its proper divisors (127669773).

3957761971 is a wasteful number, since it uses less digits than its factorization.

3957761971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127669772.

The product of its digits is 2500470, while the sum is 55.

The square root of 3957761971 is about 62910.7460693322. The cubic root of 3957761971 is about 1581.7938781063.

The spelling of 3957761971 in words is "three billion, nine hundred fifty-seven million, seven hundred sixty-one thousand, nine hundred seventy-one".