2147668991 has 8 divisors (see below), whose sum is σ = 2315997600. Its totient is φ = 1979786592.

The previous prime is 2147668969. The next prime is 2147668993. The reversal of 2147668991 is 1998667412.

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 2147668991 - 2¹⁴ = 2147652607 is a prime.

It is a super-2 number, since 2×2147668991² = 9224964189805916162, 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 (2147668993) 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, 101516 + ... + 120833.

It is an arithmetic number, because the mean of its divisors is an integer number (289499700).

Almost surely, 2^2147668991 is an apocalyptic number.

2147668991 is a deficient number, since it is larger than the sum of its proper divisors (168328609).

2147668991 is a wasteful number, since it uses less digits than its factorization.

2147668991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223105.

The product of its digits is 1306368, while the sum is 53.

The square root of 2147668991 is about 46342.9497442707. The cubic root of 2147668991 is about 1290.1962706391.

The spelling of 2147668991 in words is "two billion, one hundred forty-seven million, six hundred sixty-eight thousand, nine hundred ninety-one".