1131911919 has 48 divisors (see below), whose sum is σ = 1712430720. Its totient is φ = 719933760.

The previous prime is 1131911899. The next prime is 1131911933. The reversal of 1131911919 is 9191191311.

It is not a de Polignac number, because 1131911919 - 2¹² = 1131907823 is a prime.

It is a super-2 number, since 2×1131911919² = 2562449184748525122, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131911419) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4207717 + ... + 4207985.

It is an arithmetic number, because the mean of its divisors is an integer number (35675640).

Almost surely, 2^1131911919 is an apocalyptic number.

1131911919 is a deficient number, since it is larger than the sum of its proper divisors (580518801).

1131911919 is a wasteful number, since it uses less digits than its factorization.

1131911919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 529 counting only the distinct ones).

The product of its digits is 2187, while the sum is 36.

The square root of 1131911919 is about 33643.8986890640. The cubic root of 1131911919 is about 1042.1675450786.

The spelling of 1131911919 in words is "one billion, one hundred thirty-one million, nine hundred eleven thousand, nine hundred nineteen".