71872429 has 2 divisors, whose sum is σ = 71872430. Its totient is φ = 71872428.

The previous prime is 71872417. The next prime is 71872453. The reversal of 71872429 is 92427817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41951529 + 29920900 = 6477^2 + 5470^2 .

It is a cyclic number.

It is not a de Polignac number, because 71872429 - 2⁵ = 71872397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71872391 and 71872400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71872499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35936214 + 35936215.

It is an arithmetic number, because the mean of its divisors is an integer number (35936215).

Almost surely, 2^71872429 is an apocalyptic number.

It is an amenable number.

71872429 is a deficient number, since it is larger than the sum of its proper divisors (1).

71872429 is an equidigital number, since it uses as much as digits as its factorization.

71872429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 71872429 is about 8477.7608482429. The cubic root of 71872429 is about 415.7709171565.

The spelling of 71872429 in words is "seventy-one million, eight hundred seventy-two thousand, four hundred twenty-nine".