30664891 has 8 divisors (see below), whose sum is σ = 31811120. Its totient is φ = 29538432.

The previous prime is 30664867. The next prime is 30664927. The reversal of 30664891 is 19846603.

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 30664891 - 2¹¹ = 30662843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30664891.

It is not an unprimeable number, because it can be changed into a prime (30664801) 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, 1746 + ... + 8023.

It is an arithmetic number, because the mean of its divisors is an integer number (3976390).

Almost surely, 2^30664891 is an apocalyptic number.

30664891 is a deficient number, since it is larger than the sum of its proper divisors (1146229).

30664891 is an equidigital number, since it uses as much as digits as its factorization.

30664891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9885.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 30664891 is about 5537.5889157647. The cubic root of 30664891 is about 313.0020210344.

The spelling of 30664891 in words is "thirty million, six hundred sixty-four thousand, eight hundred ninety-one".