849616399 has 2 divisors, whose sum is σ = 849616400. Its totient is φ = 849616398.

The previous prime is 849616387. The next prime is 849616423. The reversal of 849616399 is 993616948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 849616399 - 2¹⁷ = 849485327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849616319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424808199 + 424808200.

It is an arithmetic number, because the mean of its divisors is an integer number (424808200).

Almost surely, 2^849616399 is an apocalyptic number.

849616399 is a deficient number, since it is larger than the sum of its proper divisors (1).

849616399 is an equidigital number, since it uses as much as digits as its factorization.

849616399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 55.

The square root of 849616399 is about 29148.1800289486. The cubic root of 849616399 is about 947.1257165116.

The spelling of 849616399 in words is "eight hundred forty-nine million, six hundred sixteen thousand, three hundred ninety-nine".