1957563493 has 2 divisors, whose sum is σ = 1957563494. Its totient is φ = 1957563492.

The previous prime is 1957563469. The next prime is 1957563563. The reversal of 1957563493 is 3943657591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1934504289 + 23059204 = 43983^2 + 4802^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1957563493 is a prime.

It is a super-2 number, since 2×1957563493² = 7664109658252722098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1957563493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1957563463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978781746 + 978781747.

It is an arithmetic number, because the mean of its divisors is an integer number (978781747).

Almost surely, 2^1957563493 is an apocalyptic number.

It is an amenable number.

1957563493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957563493 is an equidigital number, since it uses as much as digits as its factorization.

1957563493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3061800, while the sum is 52.

The square root of 1957563493 is about 44244.3611435401. The cubic root of 1957563493 is about 1250.9461621477.

The spelling of 1957563493 in words is "one billion, nine hundred fifty-seven million, five hundred sixty-three thousand, four hundred ninety-three".