72029081 has 2 divisors, whose sum is σ = 72029082. Its totient is φ = 72029080.

The previous prime is 72029039. The next prime is 72029093. The reversal of 72029081 is 18092027.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71995225 + 33856 = 8485^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 72029081 - 2²⁶ = 4920217 is a prime.

It is a super-2 number, since 2×72029081² = 10376377019409122, which contains 22 as substring.

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, 36014540 + 36014541.

It is an arithmetic number, because the mean of its divisors is an integer number (36014541).

Almost surely, 2^72029081 is an apocalyptic number.

It is an amenable number.

72029081 is a deficient number, since it is larger than the sum of its proper divisors (1).

72029081 is an equidigital number, since it uses as much as digits as its factorization.

72029081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 72029081 is about 8486.9948155987. The cubic root of 72029081 is about 416.0727671801.

The spelling of 72029081 in words is "seventy-two million, twenty-nine thousand, eighty-one".