72389437 has 2 divisors, whose sum is σ = 72389438. Its totient is φ = 72389436.

The previous prime is 72389389. The next prime is 72389453. The reversal of 72389437 is 73498327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44235801 + 28153636 = 6651^2 + 5306^2 .

It is a cyclic number.

It is not a de Polignac number, because 72389437 - 2¹¹ = 72387389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72389393 and 72389402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72389497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36194718 + 36194719.

It is an arithmetic number, because the mean of its divisors is an integer number (36194719).

Almost surely, 2^72389437 is an apocalyptic number.

It is an amenable number.

72389437 is a deficient number, since it is larger than the sum of its proper divisors (1).

72389437 is an equidigital number, since it uses as much as digits as its factorization.

72389437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 72389437 is about 8508.1982228907. The cubic root of 72389437 is about 416.7654733853.

The spelling of 72389437 in words is "seventy-two million, three hundred eighty-nine thousand, four hundred thirty-seven".