899424991 has 2 divisors, whose sum is σ = 899424992. Its totient is φ = 899424990.

The previous prime is 899424859. The next prime is 899424997. The reversal of 899424991 is 199424998.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 899424991 - 2²³ = 891036383 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 (899424997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449712495 + 449712496.

It is an arithmetic number, because the mean of its divisors is an integer number (449712496).

Almost surely, 2^899424991 is an apocalyptic number.

899424991 is a deficient number, since it is larger than the sum of its proper divisors (1).

899424991 is an equidigital number, since it uses as much as digits as its factorization.

899424991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 55.

The square root of 899424991 is about 29990.4149854583. The cubic root of 899424991 is about 965.2837241023.

The spelling of 899424991 in words is "eight hundred ninety-nine million, four hundred twenty-four thousand, nine hundred ninety-one".