72896189 has 2 divisors, whose sum is σ = 72896190. Its totient is φ = 72896188.

The previous prime is 72896183. The next prime is 72896191. The reversal of 72896189 is 98169827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72812089 + 84100 = 8533^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 72896189 - 2¹² = 72892093 is a prime.

Together with 72896191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72896183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36448094 + 36448095.

It is an arithmetic number, because the mean of its divisors is an integer number (36448095).

Almost surely, 2^72896189 is an apocalyptic number.

It is an amenable number.

72896189 is a deficient number, since it is larger than the sum of its proper divisors (1).

72896189 is an equidigital number, since it uses as much as digits as its factorization.

72896189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 72896189 is about 8537.9265047200. The cubic root of 72896189 is about 417.7357154353.

The spelling of 72896189 in words is "seventy-two million, eight hundred ninety-six thousand, one hundred eighty-nine".