1130031997 has 4 divisors (see below), whose sum is σ = 1131991036. Its totient is φ = 1128072960.

The previous prime is 1130031977. The next prime is 1130032019. The reversal of 1130031997 is 7991300311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7991300311 = 31 ⋅257783881.

It can be written as a sum of positive squares in 2 ways, for example, as 891977956 + 238054041 = 29866^2 + 15429^2 .

It is a cyclic number.

It is not a de Polignac number, because 1130031997 - 2¹⁵ = 1129999229 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 (1130031967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 978654 + ... + 979807.

It is an arithmetic number, because the mean of its divisors is an integer number (282997759).

Almost surely, 2^1130031997 is an apocalyptic number.

It is an amenable number.

1130031997 is a deficient number, since it is larger than the sum of its proper divisors (1959039).

1130031997 is an equidigital number, since it uses as much as digits as its factorization.

1130031997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959038.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 1130031997 is about 33615.9485512457. The cubic root of 1130031997 is about 1041.5902683197.

The spelling of 1130031997 in words is "one billion, one hundred thirty million, thirty-one thousand, nine hundred ninety-seven".