72277313 has 4 divisors (see below), whose sum is σ = 73148208. Its totient is φ = 71406420.

The previous prime is 72277307. The next prime is 72277321. The reversal of 72277313 is 31377227.

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 a cyclic number.

It is not a de Polignac number, because 72277313 - 2¹⁰ = 72276289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72277313.

It is not an unprimeable number, because it can be changed into a prime (72277343) 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, 435323 + ... + 435488.

It is an arithmetic number, because the mean of its divisors is an integer number (18287052).

Almost surely, 2^72277313 is an apocalyptic number.

It is an amenable number.

72277313 is a deficient number, since it is larger than the sum of its proper divisors (870895).

72277313 is an equidigital number, since it uses as much as digits as its factorization.

72277313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870894.

The product of its digits is 12348, while the sum is 32.

The square root of 72277313 is about 8501.6064952455. The cubic root of 72277313 is about 416.5501861783.

The spelling of 72277313 in words is "seventy-two million, two hundred seventy-seven thousand, three hundred thirteen".