164261291 has 2 divisors, whose sum is σ = 164261292. Its totient is φ = 164261290.

The previous prime is 164261267. The next prime is 164261297. The reversal of 164261291 is 192162461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164261291 - 2¹⁰ = 164260267 is a prime.

It is not a weakly prime, because it can be changed into another prime (164261297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82130645 + 82130646.

It is an arithmetic number, because the mean of its divisors is an integer number (82130646).

Almost surely, 2^164261291 is an apocalyptic number.

164261291 is a deficient number, since it is larger than the sum of its proper divisors (1).

164261291 is an equidigital number, since it uses as much as digits as its factorization.

164261291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 164261291 is about 12816.4461142705. The cubic root of 164261291 is about 547.6609102874.

The spelling of 164261291 in words is "one hundred sixty-four million, two hundred sixty-one thousand, two hundred ninety-one".