311769149 has 2 divisors, whose sum is σ = 311769150. Its totient is φ = 311769148.

The previous prime is 311769131. The next prime is 311769151. The reversal of 311769149 is 941967113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264062500 + 47706649 = 16250^2 + 6907^2 .

It is a cyclic number.

It is not a de Polignac number, because 311769149 - 2⁸ = 311768893 is a prime.

Together with 311769151, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_16854773 and since 311769149 and 16854773 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311769179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155884574 + 155884575.

It is an arithmetic number, because the mean of its divisors is an integer number (155884575).

Almost surely, 2^311769149 is an apocalyptic number.

It is an amenable number.

311769149 is a deficient number, since it is larger than the sum of its proper divisors (1).

311769149 is an equidigital number, since it uses as much as digits as its factorization.

311769149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 311769149 is about 17656.9858413037. The cubic root of 311769149 is about 678.0749685784.

The spelling of 311769149 in words is "three hundred eleven million, seven hundred sixty-nine thousand, one hundred forty-nine".