164551369 has 2 divisors, whose sum is σ = 164551370. Its totient is φ = 164551368.

The previous prime is 164551363. The next prime is 164551399. The reversal of 164551369 is 963155461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143712144 + 20839225 = 11988^2 + 4565^2 .

It is a cyclic number.

It is not a de Polignac number, because 164551369 - 2⁷ = 164551241 is a prime.

It is a super-2 number, since 2×164551369² = 54154306079548322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164551363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82275684 + 82275685.

It is an arithmetic number, because the mean of its divisors is an integer number (82275685).

Almost surely, 2^164551369 is an apocalyptic number.

It is an amenable number.

164551369 is a deficient number, since it is larger than the sum of its proper divisors (1).

164551369 is an equidigital number, since it uses as much as digits as its factorization.

164551369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 164551369 is about 12827.7577541829. The cubic root of 164551369 is about 547.9831021571.

The spelling of 164551369 in words is "one hundred sixty-four million, five hundred fifty-one thousand, three hundred sixty-nine".