164340457 has 2 divisors, whose sum is σ = 164340458. Its totient is φ = 164340456.

The previous prime is 164340403. The next prime is 164340467. The reversal of 164340457 is 754043461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164249856 + 90601 = 12816^2 + 301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164340457 is a prime.

It is not a weakly prime, because it can be changed into another prime (164340467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82170228 + 82170229.

It is an arithmetic number, because the mean of its divisors is an integer number (82170229).

Almost surely, 2^164340457 is an apocalyptic number.

It is an amenable number.

164340457 is a deficient number, since it is larger than the sum of its proper divisors (1).

164340457 is an equidigital number, since it uses as much as digits as its factorization.

164340457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 164340457 is about 12819.5341959059. The cubic root of 164340457 is about 547.7488781830.

It can be divided in two parts, 1643404 and 57, that added together give a palindrome (1643461).

The spelling of 164340457 in words is "one hundred sixty-four million, three hundred forty thousand, four hundred fifty-seven".