1971113908 has 6 divisors (see below), whose sum is σ = 3449449346. Its totient is φ = 985556952.

The previous prime is 1971113899. The next prime is 1971113929. The reversal of 1971113908 is 8093111791.

It can be written as a sum of positive squares in only one way, i.e., 1263660304 + 707453604 = 35548^2 + 26598^2 .

It is a super-2 number, since 2×1971113908² = 7770580076622064928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246389235 + ... + 246389242.

Almost surely, 2^1971113908 is an apocalyptic number.

It is an amenable number.

1971113908 is a deficient number, since it is larger than the sum of its proper divisors (1478335438).

1971113908 is a wasteful number, since it uses less digits than its factorization.

1971113908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492778481 (or 492778479 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 40.

The square root of 1971113908 is about 44397.2286072002. The cubic root of 1971113908 is about 1253.8259116794.

The spelling of 1971113908 in words is "one billion, nine hundred seventy-one million, one hundred thirteen thousand, nine hundred eight".