163807313 has 2 divisors, whose sum is σ = 163807314. Its totient is φ = 163807312.

The previous prime is 163807309. The next prime is 163807321. The reversal of 163807313 is 313708361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158180929 + 5626384 = 12577^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 163807313 - 2² = 163807309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163807313.

It is not a weakly prime, because it can be changed into another prime (163807373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81903656 + 81903657.

It is an arithmetic number, because the mean of its divisors is an integer number (81903657).

Almost surely, 2^163807313 is an apocalyptic number.

It is an amenable number.

163807313 is a deficient number, since it is larger than the sum of its proper divisors (1).

163807313 is an equidigital number, since it uses as much as digits as its factorization.

163807313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 163807313 is about 12798.7231003722. The cubic root of 163807313 is about 547.1559112040.

The spelling of 163807313 in words is "one hundred sixty-three million, eight hundred seven thousand, three hundred thirteen".