72380437 has 2 divisors, whose sum is σ = 72380438. Its totient is φ = 72380436.

The previous prime is 72380419. The next prime is 72380447. The reversal of 72380437 is 73408327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71673156 + 707281 = 8466^2 + 841^2 .

It is a cyclic number.

It is not a de Polignac number, because 72380437 - 2¹⁵ = 72347669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72380447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36190218 + 36190219.

It is an arithmetic number, because the mean of its divisors is an integer number (36190219).

Almost surely, 2^72380437 is an apocalyptic number.

It is an amenable number.

72380437 is a deficient number, since it is larger than the sum of its proper divisors (1).

72380437 is an equidigital number, since it uses as much as digits as its factorization.

72380437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 72380437 is about 8507.6693048096. The cubic root of 72380437 is about 416.7482008620.

The spelling of 72380437 in words is "seventy-two million, three hundred eighty thousand, four hundred thirty-seven".