64869169 has 8 divisors (see below), whose sum is σ = 66591720. Its totient is φ = 63168000.

The previous prime is 64869157. The next prime is 64869179. The reversal of 64869169 is 96196846.

It can be written as a sum of positive squares in 4 ways, for example, as 17740944 + 47128225 = 4212^2 + 6865^2 .

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 64869169 - 2⁵ = 64869137 is a prime.

It is a super-2 number, since 2×64869169² = 8416018173501122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (64869149) 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, 897 + ... + 11425.

It is an arithmetic number, because the mean of its divisors is an integer number (8323965).

Almost surely, 2^64869169 is an apocalyptic number.

It is an amenable number.

64869169 is a deficient number, since it is larger than the sum of its proper divisors (1722551).

64869169 is a wasteful number, since it uses less digits than its factorization.

64869169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10691.

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

The square root of 64869169 is about 8054.1398671739. The cubic root of 64869169 is about 401.8026328338.

The spelling of 64869169 in words is "sixty-four million, eight hundred sixty-nine thousand, one hundred sixty-nine".