164134391 has 2 divisors, whose sum is σ = 164134392. Its totient is φ = 164134390.

The previous prime is 164134349. The next prime is 164134427. The reversal of 164134391 is 193431461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164134391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164134301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82067195 + 82067196.

It is an arithmetic number, because the mean of its divisors is an integer number (82067196).

Almost surely, 2^164134391 is an apocalyptic number.

164134391 is a deficient number, since it is larger than the sum of its proper divisors (1).

164134391 is an equidigital number, since it uses as much as digits as its factorization.

164134391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 164134391 is about 12811.4944873734. The cubic root of 164134391 is about 547.5198422088.

The spelling of 164134391 in words is "one hundred sixty-four million, one hundred thirty-four thousand, three hundred ninety-one".