261800059 has 2 divisors, whose sum is σ = 261800060. Its totient is φ = 261800058.

The previous prime is 261800057. The next prime is 261800093. The reversal of 261800059 is 950008162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261800059 - 2¹ = 261800057 is a prime.

Together with 261800057, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 261800059.

It is not a weakly prime, because it can be changed into another prime (261800057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130900029 + 130900030.

It is an arithmetic number, because the mean of its divisors is an integer number (130900030).

Almost surely, 2^261800059 is an apocalyptic number.

261800059 is a deficient number, since it is larger than the sum of its proper divisors (1).

261800059 is an equidigital number, since it uses as much as digits as its factorization.

261800059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 261800059 is about 16180.2366793567. The cubic root of 261800059 is about 639.7199775959.

The spelling of 261800059 in words is "two hundred sixty-one million, eight hundred thousand, fifty-nine".