64134191 has 4 divisors (see below), whose sum is σ = 69964584. Its totient is φ = 58303800.

The previous prime is 64134181. The next prime is 64134193. The reversal of 64134191 is 19143146.

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 64134191 - 2¹⁸ = 63872047 is a prime.

It is a super-2 number, since 2×64134191² = 8226388910448962, 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 (64134193) 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, 2915180 + ... + 2915201.

It is an arithmetic number, because the mean of its divisors is an integer number (17491146).

Almost surely, 2^64134191 is an apocalyptic number.

64134191 is a deficient number, since it is larger than the sum of its proper divisors (5830393).

64134191 is a wasteful number, since it uses less digits than its factorization.

64134191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830392.

The product of its digits is 2592, while the sum is 29.

The square root of 64134191 is about 8008.3825458079. The cubic root of 64134191 is about 400.2793694197.

The spelling of 64134191 in words is "sixty-four million, one hundred thirty-four thousand, one hundred ninety-one".