1161007631 has 8 divisors (see below), whose sum is σ = 1331764224. Its totient is φ = 991475640.

The previous prime is 1161007607. The next prime is 1161007643. The reversal of 1161007631 is 1367001611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161007631 is a prime.

It is a super-2 number, since 2×1161007631² = 2695877438480464322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1161007631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161007651) 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, 304115 + ... + 307908.

It is an arithmetic number, because the mean of its divisors is an integer number (166470528).

Almost surely, 2^1161007631 is an apocalyptic number.

1161007631 is a deficient number, since it is larger than the sum of its proper divisors (170756593).

1161007631 is an equidigital number, since it uses as much as digits as its factorization.

1161007631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612301.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1161007631 is about 34073.5620532987. The cubic root of 1161007631 is about 1051.0217208182.

The spelling of 1161007631 in words is "one billion, one hundred sixty-one million, seven thousand, six hundred thirty-one".