64862869 has 4 divisors (see below), whose sum is σ = 64880460. Its totient is φ = 64845280.

The previous prime is 64862857. The next prime is 64862873. The reversal of 64862869 is 96826846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17114769 + 47748100 = 4137^2 + 6910^2 .

It is a cyclic number.

It is not a de Polignac number, because 64862869 - 2²⁵ = 31308437 is a prime.

It is a super-2 number, since 2×64862869² = 8414383549822322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64862669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904 + ... + 11425.

It is an arithmetic number, because the mean of its divisors is an integer number (16220115).

Almost surely, 2^64862869 is an apocalyptic number.

It is an amenable number.

64862869 is a deficient number, since it is larger than the sum of its proper divisors (17591).

64862869 is a wasteful number, since it uses less digits than its factorization.

64862869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17590.

The product of its digits is 995328, while the sum is 49.

The square root of 64862869 is about 8053.7487544621. The cubic root of 64862869 is about 401.7896249155.

The spelling of 64862869 in words is "sixty-four million, eight hundred sixty-two thousand, eight hundred sixty-nine".