1136620391 has 4 divisors (see below), whose sum is σ = 1203480432. Its totient is φ = 1069760352.

The previous prime is 1136620379. The next prime is 1136620393. The reversal of 1136620391 is 1930266311.

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 1136620391 - 2¹⁸ = 1136358247 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 (1136620393) 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, 33429995 + ... + 33430028.

It is an arithmetic number, because the mean of its divisors is an integer number (300870108).

Almost surely, 2^1136620391 is an apocalyptic number.

1136620391 is a deficient number, since it is larger than the sum of its proper divisors (66860041).

1136620391 is an equidigital number, since it uses as much as digits as its factorization.

1136620391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66860040.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1136620391 is about 33713.8011947630. The cubic root of 1136620391 is about 1043.6105985865.

The spelling of 1136620391 in words is "one billion, one hundred thirty-six million, six hundred twenty thousand, three hundred ninety-one".