731630313 has 10 divisors (see below), whose sum is σ = 1092929354. Its totient is φ = 487753488.

The previous prime is 731630311. The next prime is 731630329. The reversal of 731630313 is 313036137.

731630313 is a `hidden beast` number, since 7 + 316 + 30 + 313 = 666.

It can be written as a sum of positive squares in only one way, i.e., 723179664 + 8450649 = 26892^2 + 2907^2 .

It is not a de Polignac number, because 731630313 - 2¹ = 731630311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731630311) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4516156 + ... + 4516317.

Almost surely, 2^731630313 is an apocalyptic number.

It is an amenable number.

731630313 is a deficient number, since it is larger than the sum of its proper divisors (361299041).

731630313 is an equidigital number, since it uses as much as digits as its factorization.

731630313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9032485 (or 9032476 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 27.

The square root of 731630313 is about 27048.6656417650. The cubic root of 731630313 is about 901.0811340901.

The spelling of 731630313 in words is "seven hundred thirty-one million, six hundred thirty thousand, three hundred thirteen".