164251091 has 2 divisors, whose sum is σ = 164251092. Its totient is φ = 164251090.

The previous prime is 164251079. The next prime is 164251123. The reversal of 164251091 is 190152461.

164251091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164251091 - 2¹⁸ = 163988947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164251001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82125545 + 82125546.

It is an arithmetic number, because the mean of its divisors is an integer number (82125546).

Almost surely, 2^164251091 is an apocalyptic number.

164251091 is a deficient number, since it is larger than the sum of its proper divisors (1).

164251091 is an equidigital number, since it uses as much as digits as its factorization.

164251091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 164251091 is about 12816.0481818695. The cubic root of 164251091 is about 547.6495741678.

The spelling of 164251091 in words is "one hundred sixty-four million, two hundred fifty-one thousand, ninety-one".