164454397 has 2 divisors, whose sum is σ = 164454398. Its totient is φ = 164454396.

The previous prime is 164454391. The next prime is 164454421. The reversal of 164454397 is 793454461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161264601 + 3189796 = 12699^2 + 1786^2 .

It is an emirp because it is prime and its reverse (793454461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164454397 - 2¹¹ = 164452349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164454391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82227198 + 82227199.

It is an arithmetic number, because the mean of its divisors is an integer number (82227199).

Almost surely, 2^164454397 is an apocalyptic number.

It is an amenable number.

164454397 is a deficient number, since it is larger than the sum of its proper divisors (1).

164454397 is an equidigital number, since it uses as much as digits as its factorization.

164454397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 43.

The square root of 164454397 is about 12823.9774251205. The cubic root of 164454397 is about 547.8754367726.

The spelling of 164454397 in words is "one hundred sixty-four million, four hundred fifty-four thousand, three hundred ninety-seven".