1995972147 has 12 divisors (see below), whose sum is σ = 3104845744. Its totient is φ = 1228290480.

The previous prime is 1995972133. The next prime is 1995972179. The reversal of 1995972147 is 7412795991.

1995972147 is a `hidden beast` number, since 1 + 9 + 9 + 597 + 2 + 1 + 47 = 666.

It is not a de Polignac number, because 1995972147 - 2⁷ = 1995972019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1995972093 and 1995972102.

It is not an unprimeable number, because it can be changed into a prime (1995972197) 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, 8529679 + ... + 8529912.

Almost surely, 2^1995972147 is an apocalyptic number.

1995972147 is a deficient number, since it is larger than the sum of its proper divisors (1108873597).

1995972147 is a wasteful number, since it uses less digits than its factorization.

1995972147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17059610 (or 17059607 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 54.

The square root of 1995972147 is about 44676.3040884091. The cubic root of 1995972147 is about 1259.0746853382.

The spelling of 1995972147 in words is "one billion, nine hundred ninety-five million, nine hundred seventy-two thousand, one hundred forty-seven".