64143879 has 16 divisors (see below), whose sum is σ = 87241440. Its totient is φ = 41909760.

The previous prime is 64143847. The next prime is 64143881. The reversal of 64143879 is 97834146.

It is not a de Polignac number, because 64143879 - 2⁵ = 64143847 is a prime.

It is a super-2 number, since 2×64143879² = 8228874426333282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64143879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64143889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74419 + ... + 75275.

It is an arithmetic number, because the mean of its divisors is an integer number (5452590).

Almost surely, 2^64143879 is an apocalyptic number.

64143879 is a deficient number, since it is larger than the sum of its proper divisors (23097561).

64143879 is a wasteful number, since it uses less digits than its factorization.

64143879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330.

The product of its digits is 145152, while the sum is 42.

The square root of 64143879 is about 8008.9873891772. The cubic root of 64143879 is about 400.2995235748.

The spelling of 64143879 in words is "sixty-four million, one hundred forty-three thousand, eight hundred seventy-nine".