319172947 has 2 divisors, whose sum is σ = 319172948. Its totient is φ = 319172946.

The previous prime is 319172941. The next prime is 319172951. The reversal of 319172947 is 749271913.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319172947 is a prime.

It is not a weakly prime, because it can be changed into another prime (319172941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159586473 + 159586474.

It is an arithmetic number, because the mean of its divisors is an integer number (159586474).

Almost surely, 2^319172947 is an apocalyptic number.

319172947 is a deficient number, since it is larger than the sum of its proper divisors (1).

319172947 is an equidigital number, since it uses as much as digits as its factorization.

319172947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 43.

The square root of 319172947 is about 17865.4120299533. The cubic root of 319172947 is about 683.4006033054.

The spelling of 319172947 in words is "three hundred nineteen million, one hundred seventy-two thousand, nine hundred forty-seven".