164865869 has 8 divisors (see below), whose sum is σ = 198335040. Its totient is φ = 133875936.

The previous prime is 164865851. The next prime is 164865887. The reversal of 164865869 is 968568461.

It is an interprime number because it is at equal distance from previous prime (164865851) and next prime (164865887).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164865869 - 2²⁴ = 148088653 is a prime.

It is a super-2 number, since 2×164865869² = 54361509522250322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164865869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164865839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619664 + ... + 619929.

It is an arithmetic number, because the mean of its divisors is an integer number (24791880).

Almost surely, 2^164865869 is an apocalyptic number.

164865869 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

164865869 is a deficient number, since it is larger than the sum of its proper divisors (33469171).

164865869 is a wasteful number, since it uses less digits than its factorization.

164865869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239619.

The product of its digits is 2488320, while the sum is 53.

The square root of 164865869 is about 12840.0104750736. The cubic root of 164865869 is about 548.3319922075.

The spelling of 164865869 in words is "one hundred sixty-four million, eight hundred sixty-five thousand, eight hundred sixty-nine".