72621089 has 2 divisors, whose sum is σ = 72621090. Its totient is φ = 72621088.

The previous prime is 72621083. The next prime is 72621139. The reversal of 72621089 is 98012627.

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., 47541025 + 25080064 = 6895^2 + 5008^2 .

It is an emirp because it is prime and its reverse (98012627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72621089 - 2²⁰ = 71572513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72621083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36310544 + 36310545.

It is an arithmetic number, because the mean of its divisors is an integer number (36310545).

Almost surely, 2^72621089 is an apocalyptic number.

It is an amenable number.

72621089 is a deficient number, since it is larger than the sum of its proper divisors (1).

72621089 is an equidigital number, since it uses as much as digits as its factorization.

72621089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 72621089 is about 8521.8008073411. The cubic root of 72621089 is about 417.2095609884.

The spelling of 72621089 in words is "seventy-two million, six hundred twenty-one thousand, eighty-nine".