1957191122 has 4 divisors (see below), whose sum is σ = 2935786686. Its totient is φ = 978595560.

The previous prime is 1957191077. The next prime is 1957191143. The reversal of 1957191122 is 2211917591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2211917591 = 13 ⋅170147507.

It can be written as a sum of positive squares in only one way, i.e., 1893207121 + 63984001 = 43511^2 + 7999^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489297779 + ... + 489297782.

Almost surely, 2^1957191122 is an apocalyptic number.

1957191122 is a deficient number, since it is larger than the sum of its proper divisors (978595564).

1957191122 is an equidigital number, since it uses as much as digits as its factorization.

1957191122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978595563.

The product of its digits is 11340, while the sum is 38.

The square root of 1957191122 is about 44240.1528252333. The cubic root of 1957191122 is about 1250.8668380944.

The spelling of 1957191122 in words is "one billion, nine hundred fifty-seven million, one hundred ninety-one thousand, one hundred twenty-two".