1957800397 has 8 divisors (see below), whose sum is σ = 2243721600. Its totient is φ = 1673438064.

The previous prime is 1957800391. The next prime is 1957800401. The reversal of 1957800397 is 7930087591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1957800397 - 2⁷ = 1957800269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1957800397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957800391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387022 + ... + 392047.

It is an arithmetic number, because the mean of its divisors is an integer number (280465200).

Almost surely, 2^1957800397 is an apocalyptic number.

It is an amenable number.

1957800397 is a deficient number, since it is larger than the sum of its proper divisors (285921203).

1957800397 is an equidigital number, since it uses as much as digits as its factorization.

1957800397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779435.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 1957800397 is about 44247.0382850649. The cubic root of 1957800397 is about 1250.9966232092.

The spelling of 1957800397 in words is "one billion, nine hundred fifty-seven million, eight hundred thousand, three hundred ninety-seven".