1983372890957 has 2 divisors, whose sum is σ = 1983372890958. Its totient is φ = 1983372890956.

The previous prime is 1983372890909. The next prime is 1983372890969. The reversal of 1983372890957 is 7590982733891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1616226573481 + 367146317476 = 1271309^2 + 605926^2 .

It is a cyclic number.

It is not a de Polignac number, because 1983372890957 - 2¹⁴ = 1983372874573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1983372899957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991686445478 + 991686445479.

It is an arithmetic number, because the mean of its divisors is an integer number (991686445479).

Almost surely, 2^{1983372890957} is an apocalyptic number.

It is an amenable number.

1983372890957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983372890957 is an equidigital number, since it uses as much as digits as its factorization.

1983372890957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 205752960, while the sum is 71.

The spelling of 1983372890957 in words is "one trillion, nine hundred eighty-three billion, three hundred seventy-two million, eight hundred ninety thousand, nine hundred fifty-seven".