8697249989 has 2 divisors, whose sum is σ = 8697249990. Its totient is φ = 8697249988.

The previous prime is 8697249973. The next prime is 8697250013. The reversal of 8697249989 is 9899427968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8457929089 + 239320900 = 91967^2 + 15470^2 .

It is a cyclic number.

It is not a de Polignac number, because 8697249989 - 2⁴ = 8697249973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8697249389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4348624994 + 4348624995.

It is an arithmetic number, because the mean of its divisors is an integer number (4348624995).

Almost surely, 2^8697249989 is an apocalyptic number.

It is an amenable number.

8697249989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8697249989 is an equidigital number, since it uses as much as digits as its factorization.

8697249989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141087744, while the sum is 71.

The square root of 8697249989 is about 93259.0477594533. The cubic root of 8697249989 is about 2056.4933893291.

The spelling of 8697249989 in words is "eight billion, six hundred ninety-seven million, two hundred forty-nine thousand, nine hundred eighty-nine".