1959991567 has 2 divisors, whose sum is σ = 1959991568. Its totient is φ = 1959991566.

The previous prime is 1959991513. The next prime is 1959991571. The reversal of 1959991567 is 7651999591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1959991567 is a prime.

It is a super-2 number, since 2×1959991567² = 7683133885422230978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1959991507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979995783 + 979995784.

It is an arithmetic number, because the mean of its divisors is an integer number (979995784).

Almost surely, 2^1959991567 is an apocalyptic number.

1959991567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1959991567 is an equidigital number, since it uses as much as digits as its factorization.

1959991567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6889050, while the sum is 61.

The square root of 1959991567 is about 44271.7920012281. The cubic root of 1959991567 is about 1251.4631543020.

The spelling of 1959991567 in words is "one billion, nine hundred fifty-nine million, nine hundred ninety-one thousand, five hundred sixty-seven".