862349989 has 2 divisors, whose sum is σ = 862349990. Its totient is φ = 862349988.

The previous prime is 862349981. The next prime is 862350011. The reversal of 862349989 is 989943268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 753502500 + 108847489 = 27450^2 + 10433^2 .

It is a cyclic number.

It is not a de Polignac number, because 862349989 - 2³ = 862349981 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 (862349981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431174994 + 431174995.

It is an arithmetic number, because the mean of its divisors is an integer number (431174995).

Almost surely, 2^862349989 is an apocalyptic number.

It is an amenable number.

862349989 is a deficient number, since it is larger than the sum of its proper divisors (1).

862349989 is an equidigital number, since it uses as much as digits as its factorization.

862349989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 58.

The square root of 862349989 is about 29365.7962432487. The cubic root of 862349989 is about 951.8339417566.

The spelling of 862349989 in words is "eight hundred sixty-two million, three hundred forty-nine thousand, nine hundred eighty-nine".