1393345691 has 8 divisors (see below), whose sum is σ = 1429216320. Its totient is φ = 1357734528.

The previous prime is 1393345669. The next prime is 1393345697. The reversal of 1393345691 is 1965433931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1393345691 - 2⁶ = 1393345627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1393345697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53966 + ... + 75491.

It is an arithmetic number, because the mean of its divisors is an integer number (178652040).

Almost surely, 2^1393345691 is an apocalyptic number.

1393345691 is a deficient number, since it is larger than the sum of its proper divisors (35870629).

1393345691 is a wasteful number, since it uses less digits than its factorization.

1393345691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129733.

The product of its digits is 262440, while the sum is 44.

The square root of 1393345691 is about 37327.5460082765. The cubic root of 1393345691 is about 1116.9137213028.

The spelling of 1393345691 in words is "one billion, three hundred ninety-three million, three hundred forty-five thousand, six hundred ninety-one".