259954861 has 2 divisors, whose sum is σ = 259954862. Its totient is φ = 259954860.

The previous prime is 259954847. The next prime is 259954879. The reversal of 259954861 is 168459952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237344836 + 22610025 = 15406^2 + 4755^2 .

It is a cyclic number.

It is not a de Polignac number, because 259954861 - 2¹⁵ = 259922093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259954061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129977430 + 129977431.

It is an arithmetic number, because the mean of its divisors is an integer number (129977431).

Almost surely, 2^259954861 is an apocalyptic number.

It is an amenable number.

259954861 is a deficient number, since it is larger than the sum of its proper divisors (1).

259954861 is an equidigital number, since it uses as much as digits as its factorization.

259954861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 49.

The square root of 259954861 is about 16123.1157348696. The cubic root of 259954861 is about 638.2134918686.

The spelling of 259954861 in words is "two hundred fifty-nine million, nine hundred fifty-four thousand, eight hundred sixty-one".