72388541 has 2 divisors, whose sum is σ = 72388542. Its totient is φ = 72388540.

The previous prime is 72388531. The next prime is 72388543. The reversal of 72388541 is 14588327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40691641 + 31696900 = 6379^2 + 5630^2 .

It is a cyclic number.

It is not a de Polignac number, because 72388541 - 2¹⁰ = 72387517 is a prime.

Together with 72388543, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72388495 and 72388504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72388543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36194270 + 36194271.

It is an arithmetic number, because the mean of its divisors is an integer number (36194271).

Almost surely, 2^72388541 is an apocalyptic number.

It is an amenable number.

72388541 is a deficient number, since it is larger than the sum of its proper divisors (1).

72388541 is an equidigital number, since it uses as much as digits as its factorization.

72388541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 72388541 is about 8508.1455676311. The cubic root of 72388541 is about 416.7637538738.

The spelling of 72388541 in words is "seventy-two million, three hundred eighty-eight thousand, five hundred forty-one".