1131563639 has 8 divisors (see below), whose sum is σ = 1261185840. Its totient is φ = 1008948096.

The previous prime is 1131563611. The next prime is 1131563659. The reversal of 1131563639 is 9363651311.

It is a happy number.

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

It is not a de Polignac number, because 1131563639 - 2²⁴ = 1114786423 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 (1131563659) 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, 1751324 + ... + 1751969.

It is an arithmetic number, because the mean of its divisors is an integer number (157648230).

Almost surely, 2^1131563639 is an apocalyptic number.

1131563639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1131563639 is a deficient number, since it is larger than the sum of its proper divisors (129622201).

1131563639 is a wasteful number, since it uses less digits than its factorization.

1131563639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503329.

The product of its digits is 43740, while the sum is 38.

The square root of 1131563639 is about 33638.7223152129. The cubic root of 1131563639 is about 1042.0606453160.

The spelling of 1131563639 in words is "one billion, one hundred thirty-one million, five hundred sixty-three thousand, six hundred thirty-nine".