72029689 has 2 divisors, whose sum is σ = 72029690. Its totient is φ = 72029688.

The previous prime is 72029681. The next prime is 72029717. The reversal of 72029689 is 98692027.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68343289 + 3686400 = 8267^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 72029689 - 2³ = 72029681 is a prime.

It is not a weakly prime, because it can be changed into another prime (72029681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36014844 + 36014845.

It is an arithmetic number, because the mean of its divisors is an integer number (36014845).

Almost surely, 2^72029689 is an apocalyptic number.

It is an amenable number.

72029689 is a deficient number, since it is larger than the sum of its proper divisors (1).

72029689 is an equidigital number, since it uses as much as digits as its factorization.

72029689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 72029689 is about 8487.0306350337. The cubic root of 72029689 is about 416.0739378718.

The spelling of 72029689 in words is "seventy-two million, twenty-nine thousand, six hundred eighty-nine".