1163257091 has 8 divisors (see below), whose sum is σ = 1185742800. Its totient is φ = 1140791392.

The previous prime is 1163257049. The next prime is 1163257093. The reversal of 1163257091 is 1907523611.

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

It is a cyclic number.

It is not a de Polignac number, because 1163257091 - 2¹⁸ = 1162994947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163257093) 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, 171521 + ... + 178173.

It is an arithmetic number, because the mean of its divisors is an integer number (148217850).

Almost surely, 2^1163257091 is an apocalyptic number.

1163257091 is a deficient number, since it is larger than the sum of its proper divisors (22485709).

1163257091 is an equidigital number, since it uses as much as digits as its factorization.

1163257091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 1163257091 is about 34106.5549564889. The cubic root of 1163257091 is about 1051.7000700939.

The spelling of 1163257091 in words is "one billion, one hundred sixty-three million, two hundred fifty-seven thousand, ninety-one".