260400311 has 2 divisors, whose sum is σ = 260400312. Its totient is φ = 260400310.

The previous prime is 260400293. The next prime is 260400317. The reversal of 260400311 is 113004062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260400311 - 2⁶ = 260400247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 260400311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260400317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130200155 + 130200156.

It is an arithmetic number, because the mean of its divisors is an integer number (130200156).

Almost surely, 2^260400311 is an apocalyptic number.

260400311 is a deficient number, since it is larger than the sum of its proper divisors (1).

260400311 is an equidigital number, since it uses as much as digits as its factorization.

260400311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 260400311 is about 16136.9238394435. The cubic root of 260400311 is about 638.5778243130.

Adding to 260400311 its reverse (113004062), we get a palindrome (373404373).

The spelling of 260400311 in words is "two hundred sixty million, four hundred thousand, three hundred eleven".