1957383913 has 4 divisors (see below), whose sum is σ = 2024879940. Its totient is φ = 1889887888.

The previous prime is 1957383907. The next prime is 1957383917. The reversal of 1957383913 is 3193837591.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1123791529 + 833592384 = 33523^2 + 28872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1957383913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1957383917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33747970 + ... + 33748027.

It is an arithmetic number, because the mean of its divisors is an integer number (506219985).

Almost surely, 2^1957383913 is an apocalyptic number.

It is an amenable number.

1957383913 is a deficient number, since it is larger than the sum of its proper divisors (67496027).

1957383913 is an equidigital number, since it uses as much as digits as its factorization.

1957383913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67496026.

The product of its digits is 612360, while the sum is 49.

The square root of 1957383913 is about 44242.3316858413. The cubic root of 1957383913 is about 1250.9079085087.

The spelling of 1957383913 in words is "one billion, nine hundred fifty-seven million, three hundred eighty-three thousand, nine hundred thirteen".