1152646991 has 8 divisors (see below), whose sum is σ = 1196064768. Its totient is φ = 1109619000.

The previous prime is 1152646973. The next prime is 1152646993. The reversal of 1152646991 is 1996462511.

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 1152646991 - 2²² = 1148452687 is a prime.

It is a super-2 number, since 2×1152646991² = 2657190171722708162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152646993) 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, 91415 + ... + 103256.

It is an arithmetic number, because the mean of its divisors is an integer number (149508096).

Almost surely, 2^1152646991 is an apocalyptic number.

1152646991 is a deficient number, since it is larger than the sum of its proper divisors (43417777).

1152646991 is a wasteful number, since it uses less digits than its factorization.

1152646991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194893.

The product of its digits is 116640, while the sum is 44.

The square root of 1152646991 is about 33950.6552366814. The cubic root of 1152646991 is about 1048.4927705036.

The spelling of 1152646991 in words is "one billion, one hundred fifty-two million, six hundred forty-six thousand, nine hundred ninety-one".