316643249 has 4 divisors (see below), whose sum is σ = 341000436. Its totient is φ = 292286064.

The previous prime is 316643233. The next prime is 316643263. The reversal of 316643249 is 942346613.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148474225 + 168169024 = 12185^2 + 12968^2 .

It is a cyclic number.

It is not a de Polignac number, because 316643249 - 2⁴ = 316643233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316643749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12178574 + ... + 12178599.

It is an arithmetic number, because the mean of its divisors is an integer number (85250109).

Almost surely, 2^316643249 is an apocalyptic number.

It is an amenable number.

316643249 is a deficient number, since it is larger than the sum of its proper divisors (24357187).

316643249 is a wasteful number, since it uses less digits than its factorization.

316643249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24357186.

The product of its digits is 93312, while the sum is 38.

The square root of 316643249 is about 17794.4724282570. The cubic root of 316643249 is about 681.5903154608.

The spelling of 316643249 in words is "three hundred sixteen million, six hundred forty-three thousand, two hundred forty-nine".