319120661 has 2 divisors, whose sum is σ = 319120662. Its totient is φ = 319120660.

The previous prime is 319120643. The next prime is 319120679. The reversal of 319120661 is 166021913.

It is a balanced prime because it is at equal distance from previous prime (319120643) and next prime (319120679).

It can be written as a sum of positive squares in only one way, i.e., 163993636 + 155127025 = 12806^2 + 12455^2 .

It is a cyclic number.

It is not a de Polignac number, because 319120661 - 2²² = 314926357 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 (319120691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159560330 + 159560331.

It is an arithmetic number, because the mean of its divisors is an integer number (159560331).

Almost surely, 2^319120661 is an apocalyptic number.

It is an amenable number.

319120661 is a deficient number, since it is larger than the sum of its proper divisors (1).

319120661 is an equidigital number, since it uses as much as digits as its factorization.

319120661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 319120661 is about 17863.9486396485. The cubic root of 319120661 is about 683.3632836896.

The spelling of 319120661 in words is "three hundred nineteen million, one hundred twenty thousand, six hundred sixty-one".