72243377 has 4 divisors (see below), whose sum is σ = 76045680. Its totient is φ = 68441076.

The previous prime is 72243343. The next prime is 72243389. The reversal of 72243377 is 77334227.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77334227 = 6143 ⋅12589.

It is a cyclic number.

It is not a de Polignac number, because 72243377 - 2¹⁸ = 71981233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72243307) 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, 1901123 + ... + 1901160.

It is an arithmetic number, because the mean of its divisors is an integer number (19011420).

Almost surely, 2^72243377 is an apocalyptic number.

It is an amenable number.

72243377 is a deficient number, since it is larger than the sum of its proper divisors (3802303).

72243377 is a wasteful number, since it uses less digits than its factorization.

72243377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802302.

The product of its digits is 49392, while the sum is 35.

The square root of 72243377 is about 8499.6104028361. The cubic root of 72243377 is about 416.4849824073.

It can be divided in two parts, 7224 and 3377, that added together give a palindrome (10601).

The spelling of 72243377 in words is "seventy-two million, two hundred forty-three thousand, three hundred seventy-seven".