72448429 has 2 divisors, whose sum is σ = 72448430. Its totient is φ = 72448428.

The previous prime is 72448423. The next prime is 72448487. The reversal of 72448429 is 92484427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67272804 + 5175625 = 8202^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 72448429 - 2⁷ = 72448301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72448391 and 72448400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72448423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36224214 + 36224215.

It is an arithmetic number, because the mean of its divisors is an integer number (36224215).

Almost surely, 2^72448429 is an apocalyptic number.

It is an amenable number.

72448429 is a deficient number, since it is larger than the sum of its proper divisors (1).

72448429 is an equidigital number, since it uses as much as digits as its factorization.

72448429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 40.

The square root of 72448429 is about 8511.6642908423. The cubic root of 72448429 is about 416.8786535872.

The spelling of 72448429 in words is "seventy-two million, four hundred forty-eight thousand, four hundred twenty-nine".