331111097 has 2 divisors, whose sum is σ = 331111098. Its totient is φ = 331111096.

The previous prime is 331111073. The next prime is 331111103. The reversal of 331111097 is 790111133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226683136 + 104427961 = 15056^2 + 10219^2 .

It is a cyclic number.

It is not a de Polignac number, because 331111097 - 2⁸ = 331110841 is a prime.

It is not a weakly prime, because it can be changed into another prime (331111037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165555548 + 165555549.

It is an arithmetic number, because the mean of its divisors is an integer number (165555549).

Almost surely, 2^331111097 is an apocalyptic number.

It is an amenable number.

331111097 is a deficient number, since it is larger than the sum of its proper divisors (1).

331111097 is an equidigital number, since it uses as much as digits as its factorization.

331111097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 331111097 is about 18196.4583641982. The cubic root of 331111097 is about 691.8170249465.

The spelling of 331111097 in words is "three hundred thirty-one million, one hundred eleven thousand, ninety-seven".