311698897 has 2 divisors, whose sum is σ = 311698898. Its totient is φ = 311698896.

The previous prime is 311698889. The next prime is 311698901. The reversal of 311698897 is 798896113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207475216 + 104223681 = 14404^2 + 10209^2 .

It is a cyclic number.

It is not a de Polignac number, because 311698897 - 2³ = 311698889 is a prime.

It is not a weakly prime, because it can be changed into another prime (311698697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155849448 + 155849449.

It is an arithmetic number, because the mean of its divisors is an integer number (155849449).

Almost surely, 2^311698897 is an apocalyptic number.

It is an amenable number.

311698897 is a deficient number, since it is larger than the sum of its proper divisors (1).

311698897 is an equidigital number, since it uses as much as digits as its factorization.

311698897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 52.

The square root of 311698897 is about 17654.9963749642. The cubic root of 311698897 is about 678.0240337747.

The spelling of 311698897 in words is "three hundred eleven million, six hundred ninety-eight thousand, eight hundred ninety-seven".