311111089 has 2 divisors, whose sum is σ = 311111090. Its totient is φ = 311111088.

The previous prime is 311111081. The next prime is 311111131. The reversal of 311111089 is 980111113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271986064 + 39125025 = 16492^2 + 6255^2 .

It is a cyclic number.

It is not a de Polignac number, because 311111089 - 2³ = 311111081 is a prime.

It is not a weakly prime, because it can be changed into another prime (311111081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155555544 + 155555545.

It is an arithmetic number, because the mean of its divisors is an integer number (155555545).

Almost surely, 2^311111089 is an apocalyptic number.

It is an amenable number.

311111089 is a deficient number, since it is larger than the sum of its proper divisors (1).

311111089 is an equidigital number, since it uses as much as digits as its factorization.

311111089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 25.

The square root of 311111089 is about 17638.3414469728. The cubic root of 311111089 is about 677.5975551573.

It can be divided in two parts, 31111108 and 9, that multiplied together give a palindrome (279999972).

The spelling of 311111089 in words is "three hundred eleven million, one hundred eleven thousand, eighty-nine".