319675987 has 2 divisors, whose sum is σ = 319675988. Its totient is φ = 319675986.

The previous prime is 319675981. The next prime is 319676003. The reversal of 319675987 is 789576913.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319675987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (319675981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159837993 + 159837994.

It is an arithmetic number, because the mean of its divisors is an integer number (159837994).

Almost surely, 2^319675987 is an apocalyptic number.

319675987 is a deficient number, since it is larger than the sum of its proper divisors (1).

319675987 is an equidigital number, since it uses as much as digits as its factorization.

319675987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 55.

The square root of 319675987 is about 17879.4850876640. The cubic root of 319675987 is about 683.7594446946.

The spelling of 319675987 in words is "three hundred nineteen million, six hundred seventy-five thousand, nine hundred eighty-seven".