899242039 has 2 divisors, whose sum is σ = 899242040. Its totient is φ = 899242038.

The previous prime is 899242037. The next prime is 899242049. The reversal of 899242039 is 930242998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 899242039 - 2¹ = 899242037 is a prime.

It is a super-4 number, since 4×899242039⁴ (a number of 37 digits) contains 4444 as substring.

Together with 899242037, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 899242039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899242031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449621019 + 449621020.

It is an arithmetic number, because the mean of its divisors is an integer number (449621020).

Almost surely, 2^899242039 is an apocalyptic number.

899242039 is a deficient number, since it is larger than the sum of its proper divisors (1).

899242039 is an equidigital number, since it uses as much as digits as its factorization.

899242039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 899242039 is about 29987.3646558013. The cubic root of 899242039 is about 965.2182702234.

The spelling of 899242039 in words is "eight hundred ninety-nine million, two hundred forty-two thousand, thirty-nine".