72608869 has 2 divisors, whose sum is σ = 72608870. Its totient is φ = 72608868.

The previous prime is 72608863. The next prime is 72608873. The reversal of 72608869 is 96880627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45724644 + 26884225 = 6762^2 + 5185^2 .

It is a cyclic number.

It is not a de Polignac number, because 72608869 - 2¹⁹ = 72084581 is a prime.

It is a super-2 number, since 2×72608869² = 10544095714918322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72608863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36304434 + 36304435.

It is an arithmetic number, because the mean of its divisors is an integer number (36304435).

Almost surely, 2^72608869 is an apocalyptic number.

It is an amenable number.

72608869 is a deficient number, since it is larger than the sum of its proper divisors (1).

72608869 is an equidigital number, since it uses as much as digits as its factorization.

72608869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 72608869 is about 8521.0837925701. The cubic root of 72608869 is about 417.1861582969.

It can be divided in two parts, 7260 and 8869, that added together give a square (16129 = 127²).

The spelling of 72608869 in words is "seventy-two million, six hundred eight thousand, eight hundred sixty-nine".