164194087 has 2 divisors, whose sum is σ = 164194088. Its totient is φ = 164194086.

The previous prime is 164194021. The next prime is 164194091. The reversal of 164194087 is 780491461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164194087 - 2¹⁹ = 163669799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164194097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82097043 + 82097044.

It is an arithmetic number, because the mean of its divisors is an integer number (82097044).

Almost surely, 2^164194087 is an apocalyptic number.

164194087 is a deficient number, since it is larger than the sum of its proper divisors (1).

164194087 is an equidigital number, since it uses as much as digits as its factorization.

164194087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 164194087 is about 12813.8240584144. The cubic root of 164194087 is about 547.5862121767.

The spelling of 164194087 in words is "one hundred sixty-four million, one hundred ninety-four thousand, eighty-seven".