311101493 has 2 divisors, whose sum is σ = 311101494. Its totient is φ = 311101492.

The previous prime is 311101489. The next prime is 311101499. The reversal of 311101493 is 394101113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 282979684 + 28121809 = 16822^2 + 5303^2 .

It is a cyclic number.

It is not a de Polignac number, because 311101493 - 2² = 311101489 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311101499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155550746 + 155550747.

It is an arithmetic number, because the mean of its divisors is an integer number (155550747).

Almost surely, 2^311101493 is an apocalyptic number.

It is an amenable number.

311101493 is a deficient number, since it is larger than the sum of its proper divisors (1).

311101493 is an equidigital number, since it uses as much as digits as its factorization.

311101493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 311101493 is about 17638.0694238343. The cubic root of 311101493 is about 677.5905884143.

The spelling of 311101493 in words is "three hundred eleven million, one hundred one thousand, four hundred ninety-three".