3957947156 has 6 divisors (see below), whose sum is σ = 6926407530. Its totient is φ = 1978973576.

The previous prime is 3957947137. The next prime is 3957947219. The reversal of 3957947156 is 6517497593.

It can be written as a sum of positive squares in only one way, i.e., 3802695556 + 155251600 = 61666^2 + 12460^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494743391 + ... + 494743398.

It is an arithmetic number, because the mean of its divisors is an integer number (1154401255).

Almost surely, 2^3957947156 is an apocalyptic number.

It is an amenable number.

3957947156 is a deficient number, since it is larger than the sum of its proper divisors (2968460374).

3957947156 is a wasteful number, since it uses less digits than its factorization.

3957947156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989486793 (or 989486791 counting only the distinct ones).

The product of its digits is 7144200, while the sum is 56.

The square root of 3957947156 is about 62912.2178594905. The cubic root of 3957947156 is about 1581.8185486089.

The spelling of 3957947156 in words is "three billion, nine hundred fifty-seven million, nine hundred forty-seven thousand, one hundred fifty-six".