1957191147 has 16 divisors (see below), whose sum is σ = 3070104480. Its totient is φ = 1228041216.

The previous prime is 1957191143. The next prime is 1957191199. The reversal of 1957191147 is 7411917591.

It is not a de Polignac number, because 1957191147 - 2² = 1957191143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1957191143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2131558 + ... + 2132475.

It is an arithmetic number, because the mean of its divisors is an integer number (191881530).

Almost surely, 2^1957191147 is an apocalyptic number.

1957191147 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1957191147 is a deficient number, since it is larger than the sum of its proper divisors (1112913333).

1957191147 is a wasteful number, since it uses less digits than its factorization.

1957191147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264059 (or 4264053 counting only the distinct ones).

The product of its digits is 79380, while the sum is 45.

The square root of 1957191147 is about 44240.1531077821. The cubic root of 1957191147 is about 1250.8668434204.

The spelling of 1957191147 in words is "one billion, nine hundred fifty-seven million, one hundred ninety-one thousand, one hundred forty-seven".