164491733 has 4 divisors (see below), whose sum is σ = 187990560. Its totient is φ = 140992908.

The previous prime is 164491729. The next prime is 164491739. The reversal of 164491733 is 337194461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 164491733 - 2² = 164491729 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164491739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11749403 + ... + 11749416.

It is an arithmetic number, because the mean of its divisors is an integer number (46997640).

Almost surely, 2^164491733 is an apocalyptic number.

It is an amenable number.

164491733 is a deficient number, since it is larger than the sum of its proper divisors (23498827).

164491733 is an equidigital number, since it uses as much as digits as its factorization.

164491733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23498826.

The product of its digits is 54432, while the sum is 38.

The square root of 164491733 is about 12825.4330531175. The cubic root of 164491733 is about 547.9168949313.

The spelling of 164491733 in words is "one hundred sixty-four million, four hundred ninety-one thousand, seven hundred thirty-three".