1307646493 has 4 divisors (see below), whose sum is σ = 1311351228. Its totient is φ = 1303941760.

The previous prime is 1307646463. The next prime is 1307646503. The reversal of 1307646493 is 3946467031.

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 296597284 + 1011049209 = 17222^2 + 31797^2 .

It is a cyclic number.

It is not a de Polignac number, because 1307646493 - 2²¹ = 1305549341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1307646413) 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, 1851838 + ... + 1852543.

It is an arithmetic number, because the mean of its divisors is an integer number (327837807).

Almost surely, 2^1307646493 is an apocalyptic number.

It is an amenable number.

1307646493 is a deficient number, since it is larger than the sum of its proper divisors (3704735).

1307646493 is an equidigital number, since it uses as much as digits as its factorization.

1307646493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3704734.

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 1307646493 is about 36161.3950643500. The cubic root of 1307646493 is about 1093.5285289897.

The spelling of 1307646493 in words is "one billion, three hundred seven million, six hundred forty-six thousand, four hundred ninety-three".