1957620859 has 2 divisors, whose sum is σ = 1957620860. Its totient is φ = 1957620858.

The previous prime is 1957620851. The next prime is 1957620883. The reversal of 1957620859 is 9580267591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1957620859 - 2³ = 1957620851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1957620851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978810429 + 978810430.

It is an arithmetic number, because the mean of its divisors is an integer number (978810430).

Almost surely, 2^1957620859 is an apocalyptic number.

1957620859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957620859 is an equidigital number, since it uses as much as digits as its factorization.

1957620859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The square root of 1957620859 is about 44245.0094247928. The cubic root of 1957620859 is about 1250.9583816026.

The spelling of 1957620859 in words is "one billion, nine hundred fifty-seven million, six hundred twenty thousand, eight hundred fifty-nine".