1161330631 has 4 divisors (see below), whose sum is σ = 1178663992. Its totient is φ = 1143997272.

The previous prime is 1161330529. The next prime is 1161330641. The reversal of 1161330631 is 1360331611.

It is a happy number.

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 1161330631 - 2¹³ = 1161322439 is a prime.

It is a super-2 number, since 2×1161330631² = 2697377668997716322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161330596 and 1161330605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161330641) 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, 8666580 + ... + 8666713.

It is an arithmetic number, because the mean of its divisors is an integer number (294665998).

Almost surely, 2^1161330631 is an apocalyptic number.

1161330631 is a deficient number, since it is larger than the sum of its proper divisors (17333361).

1161330631 is an equidigital number, since it uses as much as digits as its factorization.

1161330631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17333360.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1161330631 is about 34078.3014688232. The cubic root of 1161330631 is about 1051.1191788451.

The spelling of 1161330631 in words is "one billion, one hundred sixty-one million, three hundred thirty thousand, six hundred thirty-one".