64136073 has 4 divisors (see below), whose sum is σ = 85514768. Its totient is φ = 42757380.

The previous prime is 64136063. The next prime is 64136089. The reversal of 64136073 is 37063146.

64136073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64136073 - 2⁴ = 64136057 is a prime.

It is a super-2 number, since 2×64136073² = 8226871719722658, which contains 22 as substring.

It is the 8009-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64136073.

It is not an unprimeable number, because it can be changed into a prime (64136063) by changing a digit.

It is a nontrivial repunit in base 8008.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10689343 + ... + 10689348.

It is an arithmetic number, because the mean of its divisors is an integer number (21378692).

Almost surely, 2^64136073 is an apocalyptic number.

It is an amenable number.

64136073 is a deficient number, since it is larger than the sum of its proper divisors (21378695).

64136073 is a wasteful number, since it uses less digits than its factorization.

64136073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21378694.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 64136073 is about 8008.5000468252. The cubic root of 64136073 is about 400.2832847437.

The spelling of 64136073 in words is "sixty-four million, one hundred thirty-six thousand, seventy-three".