72437437 has 2 divisors, whose sum is σ = 72437438. Its totient is φ = 72437436.

The previous prime is 72437429. The next prime is 72437471. The reversal of 72437437 is 73473427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54552996 + 17884441 = 7386^2 + 4229^2 .

It is a cyclic number.

It is not a de Polignac number, because 72437437 - 2³ = 72437429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72437396 and 72437405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72437837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36218718 + 36218719.

It is an arithmetic number, because the mean of its divisors is an integer number (36218719).

Almost surely, 2^72437437 is an apocalyptic number.

It is an amenable number.

72437437 is a deficient number, since it is larger than the sum of its proper divisors (1).

72437437 is an equidigital number, since it uses as much as digits as its factorization.

72437437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 37.

The square root of 72437437 is about 8511.0185641908. The cubic root of 72437437 is about 416.8575693392.

The spelling of 72437437 in words is "seventy-two million, four hundred thirty-seven thousand, four hundred thirty-seven".