72182989 has 2 divisors, whose sum is σ = 72182990. Its totient is φ = 72182988.

The previous prime is 72182977. The next prime is 72183029. The reversal of 72182989 is 98928127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66096900 + 6086089 = 8130^2 + 2467^2 .

It is an emirp because it is prime and its reverse (98928127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72182989 - 2¹³ = 72174797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72182909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36091494 + 36091495.

It is an arithmetic number, because the mean of its divisors is an integer number (36091495).

Almost surely, 2^72182989 is an apocalyptic number.

It is an amenable number.

72182989 is a deficient number, since it is larger than the sum of its proper divisors (1).

72182989 is an equidigital number, since it uses as much as digits as its factorization.

72182989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 72182989 is about 8496.0572620481. The cubic root of 72182989 is about 416.3689039181.

The spelling of 72182989 in words is "seventy-two million, one hundred eighty-two thousand, nine hundred eighty-nine".