72251089 has 2 divisors, whose sum is σ = 72251090. Its totient is φ = 72251088.

The previous prime is 72251087. The next prime is 72251131. The reversal of 72251089 is 98015227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72250000 + 1089 = 8500^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 72251089 - 2¹ = 72251087 is a prime.

Together with 72251087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72251087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36125544 + 36125545.

It is an arithmetic number, because the mean of its divisors is an integer number (36125545).

Almost surely, 2^72251089 is an apocalyptic number.

It is an amenable number.

72251089 is a deficient number, since it is larger than the sum of its proper divisors (1).

72251089 is an equidigital number, since it uses as much as digits as its factorization.

72251089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 72251089 is about 8500.0640585821. The cubic root of 72251089 is about 416.4998018414.

It can be divided in two parts, 7225 and 1089, that multiplied together give a square (7868025 = 2805²).

The spelling of 72251089 in words is "seventy-two million, two hundred fifty-one thousand, eighty-nine".