1357350661 has 4 divisors (see below), whose sum is σ = 1394035852. Its totient is φ = 1320665472.

The previous prime is 1357350619. The next prime is 1357350677. The reversal of 1357350661 is 1660537531.

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 1193357025 + 163993636 = 34545^2 + 12806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1357350661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 36685153 = 1357350661 / (1 + 3 + 5 + 7 + 3 + 5 + 0 + 6 + 6 + 1).

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 1357350661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1357350611) 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, 18342540 + ... + 18342613.

It is an arithmetic number, because the mean of its divisors is an integer number (348508963).

Almost surely, 2^1357350661 is an apocalyptic number.

It is an amenable number.

1357350661 is a deficient number, since it is larger than the sum of its proper divisors (36685191).

1357350661 is an equidigital number, since it uses as much as digits as its factorization.

1357350661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36685190.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 1357350661 is about 36842.2401734748. The cubic root of 1357350661 is about 1107.2117507086.

The spelling of 1357350661 in words is "one billion, three hundred fifty-seven million, three hundred fifty thousand, six hundred sixty-one".