164069869 has 2 divisors, whose sum is σ = 164069870. Its totient is φ = 164069868.

The previous prime is 164069863. The next prime is 164069891. The reversal of 164069869 is 968960461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163507369 + 562500 = 12787^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 164069869 - 2⁵ = 164069837 is a prime.

It is a super-2 number, since 2×164069869² = 53837843827354322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164069863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82034934 + 82034935.

It is an arithmetic number, because the mean of its divisors is an integer number (82034935).

Almost surely, 2^164069869 is an apocalyptic number.

It is an amenable number.

164069869 is a deficient number, since it is larger than the sum of its proper divisors (1).

164069869 is an equidigital number, since it uses as much as digits as its factorization.

164069869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 164069869 is about 12808.9761105250. The cubic root of 164069869 is about 547.4480885986.

The spelling of 164069869 in words is "one hundred sixty-four million, sixty-nine thousand, eight hundred sixty-nine".