890261563 has 2 divisors, whose sum is σ = 890261564. Its totient is φ = 890261562.

The previous prime is 890261543. The next prime is 890261579. The reversal of 890261563 is 365162098.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 890261563 - 2⁵ = 890261531 is a prime.

It is not a weakly prime, because it can be changed into another prime (890261513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445130781 + 445130782.

It is an arithmetic number, because the mean of its divisors is an integer number (445130782).

Almost surely, 2^890261563 is an apocalyptic number.

890261563 is a deficient number, since it is larger than the sum of its proper divisors (1).

890261563 is an equidigital number, since it uses as much as digits as its factorization.

890261563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 890261563 is about 29837.2512641497. The cubic root of 890261563 is about 961.9943936494.

The spelling of 890261563 in words is "eight hundred ninety million, two hundred sixty-one thousand, five hundred sixty-three".