311406859 has 2 divisors, whose sum is σ = 311406860. Its totient is φ = 311406858.

The previous prime is 311406857. The next prime is 311406863. The reversal of 311406859 is 958604113.

It is a weak prime.

It is an emirp because it is prime and its reverse (958604113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311406859 - 2¹ = 311406857 is a prime.

It is a super-3 number, since 3×311406859³ (a number of 26 digits) contains 333 as substring.

Together with 311406857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (311406857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155703429 + 155703430.

It is an arithmetic number, because the mean of its divisors is an integer number (155703430).

Almost surely, 2^311406859 is an apocalyptic number.

311406859 is a deficient number, since it is larger than the sum of its proper divisors (1).

311406859 is an equidigital number, since it uses as much as digits as its factorization.

311406859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 311406859 is about 17646.7237469169. The cubic root of 311406859 is about 677.8122154071.

The spelling of 311406859 in words is "three hundred eleven million, four hundred six thousand, eight hundred fifty-nine".