316947421 has 4 divisors (see below), whose sum is σ = 362225632. Its totient is φ = 271669212.

The previous prime is 316947419. The next prime is 316947427. The reversal of 316947421 is 124749613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124749613 = 1039 ⋅120067.

It is a cyclic number.

It is not a de Polignac number, because 316947421 - 2¹ = 316947419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316947427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22639095 + ... + 22639108.

It is an arithmetic number, because the mean of its divisors is an integer number (90556408).

Almost surely, 2^316947421 is an apocalyptic number.

It is an amenable number.

316947421 is a deficient number, since it is larger than the sum of its proper divisors (45278211).

316947421 is an equidigital number, since it uses as much as digits as its factorization.

316947421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45278210.

The product of its digits is 36288, while the sum is 37.

The square root of 316947421 is about 17803.0171881061. The cubic root of 316947421 is about 681.8084940582.

The spelling of 316947421 in words is "three hundred sixteen million, nine hundred forty-seven thousand, four hundred twenty-one".