164542099 has 4 divisors (see below), whose sum is σ = 174221064. Its totient is φ = 154863136.

The previous prime is 164542097. The next prime is 164542127. The reversal of 164542099 is 990245461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164542099 - 2¹ = 164542097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164542097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4839457 + ... + 4839490.

It is an arithmetic number, because the mean of its divisors is an integer number (43555266).

Almost surely, 2^164542099 is an apocalyptic number.

164542099 is a deficient number, since it is larger than the sum of its proper divisors (9678965).

164542099 is an equidigital number, since it uses as much as digits as its factorization.

164542099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9678964.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 164542099 is about 12827.3964232809. The cubic root of 164542099 is about 547.9728117561.

The spelling of 164542099 in words is "one hundred sixty-four million, five hundred forty-two thousand, ninety-nine".