311629141 has 2 divisors, whose sum is σ = 311629142. Its totient is φ = 311629140.

The previous prime is 311629121. The next prime is 311629163. The reversal of 311629141 is 141926113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202948516 + 108680625 = 14246^2 + 10425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311629141 is a prime.

It is a super-2 number, since 2×311629141² = 194225443040795762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311629121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155814570 + 155814571.

It is an arithmetic number, because the mean of its divisors is an integer number (155814571).

Almost surely, 2^311629141 is an apocalyptic number.

It is an amenable number.

311629141 is a deficient number, since it is larger than the sum of its proper divisors (1).

311629141 is an equidigital number, since it uses as much as digits as its factorization.

311629141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 311629141 is about 17653.0207330077. The cubic root of 311629141 is about 677.9734510130.

The spelling of 311629141 in words is "three hundred eleven million, six hundred twenty-nine thousand, one hundred forty-one".