72764369 has 4 divisors (see below), whose sum is σ = 77044644. Its totient is φ = 68484096.

The previous prime is 72764327. The next prime is 72764401. The reversal of 72764369 is 96346727.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96346727 = 379 ⋅254213.

It can be written as a sum of positive squares in 2 ways, for example, as 35700625 + 37063744 = 5975^2 + 6088^2 .

It is a cyclic number.

It is not a de Polignac number, because 72764369 - 2⁸ = 72764113 is a prime.

It is a super-2 number, since 2×72764369² = 10589306791936322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72764569) by changing a digit.

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, 2140112 + ... + 2140145.

It is an arithmetic number, because the mean of its divisors is an integer number (19261161).

Almost surely, 2^72764369 is an apocalyptic number.

It is an amenable number.

72764369 is a deficient number, since it is larger than the sum of its proper divisors (4280275).

72764369 is a wasteful number, since it uses less digits than its factorization.

72764369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4280274.

The product of its digits is 381024, while the sum is 44.

The square root of 72764369 is about 8530.2033387253. The cubic root of 72764369 is about 417.4837628595.

The spelling of 72764369 in words is "seventy-two million, seven hundred sixty-four thousand, three hundred sixty-nine".