1357993393 has 4 divisors (see below), whose sum is σ = 1417036608. Its totient is φ = 1298950180.

The previous prime is 1357993387. The next prime is 1357993423. The reversal of 1357993393 is 3933997531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1357993393 - 2⁵ = 1357993361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1357993393.

It is not an unprimeable number, because it can be changed into a prime (1357993333) 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, 29521573 + ... + 29521618.

It is an arithmetic number, because the mean of its divisors is an integer number (354259152).

Almost surely, 2^1357993393 is an apocalyptic number.

It is an amenable number.

1357993393 is a deficient number, since it is larger than the sum of its proper divisors (59043215).

1357993393 is an equidigital number, since it uses as much as digits as its factorization.

1357993393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59043214.

The product of its digits is 2066715, while the sum is 52.

The square root of 1357993393 is about 36850.9619006072. The cubic root of 1357993393 is about 1107.3864852479.

The spelling of 1357993393 in words is "one billion, three hundred fifty-seven million, nine hundred ninety-three thousand, three hundred ninety-three".