1369253557 has 4 divisors (see below), whose sum is σ = 1564861216. Its totient is φ = 1173645900.

The previous prime is 1369253551. The next prime is 1369253603. The reversal of 1369253557 is 7553529631.

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 de Polignac number, because none of the positive numbers 2^k-1369253557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369253551) 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, 97803819 + ... + 97803832.

It is an arithmetic number, because the mean of its divisors is an integer number (391215304).

Almost surely, 2^1369253557 is an apocalyptic number.

It is an amenable number.

1369253557 is a deficient number, since it is larger than the sum of its proper divisors (195607659).

1369253557 is an equidigital number, since it uses as much as digits as its factorization.

1369253557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195607658.

The product of its digits is 850500, while the sum is 46.

The square root of 1369253557 is about 37003.4262873048. The cubic root of 1369253557 is about 1110.4387944040.

The spelling of 1369253557 in words is "one billion, three hundred sixty-nine million, two hundred fifty-three thousand, five hundred fifty-seven".