1315066643 has 4 divisors (see below), whose sum is σ = 1434618168. Its totient is φ = 1195515120.

The previous prime is 1315066633. The next prime is 1315066657. The reversal of 1315066643 is 3466605131.

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

It is a cyclic number.

It is not a de Polignac number, because 1315066643 - 2²⁰ = 1314018067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315066633) 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, 59775746 + ... + 59775767.

It is an arithmetic number, because the mean of its divisors is an integer number (358654542).

Almost surely, 2^1315066643 is an apocalyptic number.

1315066643 is a deficient number, since it is larger than the sum of its proper divisors (119551525).

1315066643 is a wasteful number, since it uses less digits than its factorization.

1315066643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119551524.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 1315066643 is about 36263.8476033639. The cubic root of 1315066643 is about 1095.5930130935.

The spelling of 1315066643 in words is "one billion, three hundred fifteen million, sixty-six thousand, six hundred forty-three".