966188491 has 4 divisors (see below), whose sum is σ = 966274000. Its totient is φ = 966102984.

The previous prime is 966188467. The next prime is 966188537. The reversal of 966188491 is 194881669.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 966188491 - 2⁵ = 966188459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (966188791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22656 + ... + 49453.

It is an arithmetic number, because the mean of its divisors is an integer number (241568500).

Almost surely, 2^966188491 is an apocalyptic number.

966188491 is a deficient number, since it is larger than the sum of its proper divisors (85509).

966188491 is a wasteful number, since it uses less digits than its factorization.

966188491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85508.

The product of its digits is 746496, while the sum is 52.

The square root of 966188491 is about 31083.5726871928. The cubic root of 966188491 is about 988.6000315635.

The spelling of 966188491 in words is "nine hundred sixty-six million, one hundred eighty-eight thousand, four hundred ninety-one".