1962557591 has 2 divisors, whose sum is σ = 1962557592. Its totient is φ = 1962557590.

The previous prime is 1962557567. The next prime is 1962557669. The reversal of 1962557591 is 1957552691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1962557591 - 2²⁶ = 1895448727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1962557551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 981278795 + 981278796.

It is an arithmetic number, because the mean of its divisors is an integer number (981278796).

Almost surely, 2^1962557591 is an apocalyptic number.

1962557591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1962557591 is an equidigital number, since it uses as much as digits as its factorization.

1962557591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 50.

The square root of 1962557591 is about 44300.7628715353. The cubic root of 1962557591 is about 1252.0090553075.

The spelling of 1962557591 in words is "one billion, nine hundred sixty-two million, five hundred fifty-seven thousand, five hundred ninety-one".