164120090 has 8 divisors (see below), whose sum is σ = 295416180. Its totient is φ = 65648032.

The previous prime is 164120087. The next prime is 164120137. The reversal of 164120090 is 90021461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 137194369 + 26925721 = 11713^2 + 5189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8205995 + ... + 8206014.

Almost surely, 2^164120090 is an apocalyptic number.

164120090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164120090 is a deficient number, since it is larger than the sum of its proper divisors (131296090).

164120090 is a wasteful number, since it uses less digits than its factorization.

164120090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16412016.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 164120090 is about 12810.9363436089. The cubic root of 164120090 is about 547.5039399785.

The spelling of 164120090 in words is "one hundred sixty-four million, one hundred twenty thousand, ninety".