72637429 has 2 divisors, whose sum is σ = 72637430. Its totient is φ = 72637428.

The previous prime is 72637423. The next prime is 72637441. The reversal of 72637429 is 92473627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36360900 + 36276529 = 6030^2 + 6023^2 .

It is a cyclic number.

It is not a de Polignac number, because 72637429 - 2⁹ = 72636917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72637391 and 72637400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72637423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36318714 + 36318715.

It is an arithmetic number, because the mean of its divisors is an integer number (36318715).

Almost surely, 2^72637429 is an apocalyptic number.

It is an amenable number.

72637429 is a deficient number, since it is larger than the sum of its proper divisors (1).

72637429 is an equidigital number, since it uses as much as digits as its factorization.

72637429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 40.

The square root of 72637429 is about 8522.7594709695. The cubic root of 72637429 is about 417.2408498471.

The spelling of 72637429 in words is "seventy-two million, six hundred thirty-seven thousand, four hundred twenty-nine".