1131161903 has 4 divisors (see below), whose sum is σ = 1190696760. Its totient is φ = 1071627048.

The previous prime is 1131161887. The next prime is 1131161917. The reversal of 1131161903 is 3091611311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3091611311 = 3547 ⋅871613.

It is a cyclic number.

It is not a de Polignac number, because 1131161903 - 2⁴ = 1131161887 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 (1131166903) 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, 29767400 + ... + 29767437.

It is an arithmetic number, because the mean of its divisors is an integer number (297674190).

Almost surely, 2^1131161903 is an apocalyptic number.

1131161903 is a deficient number, since it is larger than the sum of its proper divisors (59534857).

1131161903 is an equidigital number, since it uses as much as digits as its factorization.

1131161903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59534856.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 1131161903 is about 33632.7504524979. The cubic root of 1131161903 is about 1041.9373107217.

The spelling of 1131161903 in words is "one billion, one hundred thirty-one million, one hundred sixty-one thousand, nine hundred three".