65722193 has 4 divisors (see below), whose sum is σ = 66799668. Its totient is φ = 64644720.

The previous prime is 65722169. The next prime is 65722199. The reversal of 65722193 is 39122756.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4068289 + 61653904 = 2017^2 + 7852^2 .

It is a cyclic number.

It is not a de Polignac number, because 65722193 - 2⁸ = 65721937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65722199) 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, 538646 + ... + 538767.

It is an arithmetic number, because the mean of its divisors is an integer number (16699917).

Almost surely, 2^65722193 is an apocalyptic number.

It is an amenable number.

65722193 is a deficient number, since it is larger than the sum of its proper divisors (1077475).

65722193 is a wasteful number, since it uses less digits than its factorization.

65722193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077474.

The product of its digits is 22680, while the sum is 35.

The square root of 65722193 is about 8106.9225357098. The cubic root of 65722193 is about 403.5561921326.

The spelling of 65722193 in words is "sixty-five million, seven hundred twenty-two thousand, one hundred ninety-three".