64169143 has 4 divisors (see below), whose sum is σ = 64407960. Its totient is φ = 63930328.

The previous prime is 64169129. The next prime is 64169159. The reversal of 64169143 is 34196146.

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

It is a cyclic number.

It is not a de Polignac number, because 64169143 - 2²⁵ = 30614711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64169099 and 64169108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64169113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119005 + ... + 119542.

It is an arithmetic number, because the mean of its divisors is an integer number (16101990).

Almost surely, 2^64169143 is an apocalyptic number.

64169143 is a deficient number, since it is larger than the sum of its proper divisors (238817).

64169143 is a wasteful number, since it uses less digits than its factorization.

64169143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238816.

The product of its digits is 15552, while the sum is 34.

The square root of 64169143 is about 8010.5644620089. The cubic root of 64169143 is about 400.3520712736.

The spelling of 64169143 in words is "sixty-four million, one hundred sixty-nine thousand, one hundred forty-three".