64347273 has 12 divisors (see below), whose sum is σ = 93096900. Its totient is φ = 42828576.

The previous prime is 64347263. The next prime is 64347299. The reversal of 64347273 is 37274346.

It is a happy number.

64347273 is a `hidden beast` number, since 643 + 4 + 7 + 2 + 7 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8277129 + 56070144 = 2877^2 + 7488^2 .

It is not a de Polignac number, because 64347273 - 2⁶ = 64347209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64347233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 403 + ... + 11351.

It is an arithmetic number, because the mean of its divisors is an integer number (7758075).

Almost surely, 2^64347273 is an apocalyptic number.

It is an amenable number.

64347273 is a deficient number, since it is larger than the sum of its proper divisors (28749627).

64347273 is a wasteful number, since it uses less digits than its factorization.

64347273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11608 (or 11605 counting only the distinct ones).

The product of its digits is 84672, while the sum is 36.

The square root of 64347273 is about 8021.6751991090. The cubic root of 64347273 is about 400.7221807693.

It can be divided in two parts, 643472 and 73, that added together give a triangular number (643545 = T₁₁₃₄).

The spelling of 64347273 in words is "sixty-four million, three hundred forty-seven thousand, two hundred seventy-three".