318492947 has 2 divisors, whose sum is σ = 318492948. Its totient is φ = 318492946.

The previous prime is 318492919. The next prime is 318492973. The reversal of 318492947 is 749294813.

It is a strong prime.

It is an emirp because it is prime and its reverse (749294813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318492947 - 2¹⁴ = 318476563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (318492917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159246473 + 159246474.

It is an arithmetic number, because the mean of its divisors is an integer number (159246474).

Almost surely, 2^318492947 is an apocalyptic number.

318492947 is a deficient number, since it is larger than the sum of its proper divisors (1).

318492947 is an equidigital number, since it uses as much as digits as its factorization.

318492947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 318492947 is about 17846.3706954663. The cubic root of 318492947 is about 682.9149284489.

The spelling of 318492947 in words is "three hundred eighteen million, four hundred ninety-two thousand, nine hundred forty-seven".