16849999 has 2 divisors, whose sum is σ = 16850000. Its totient is φ = 16849998.

The previous prime is 16849949. The next prime is 16850003. The reversal of 16849999 is 99994861.

It is a strong prime.

It is an emirp because it is prime and its reverse (99994861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16849999 - 2⁹ = 16849487 is a prime.

16849999 is a modest number, since divided by 9999 gives 1684 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16849909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8424999 + 8425000.

It is an arithmetic number, because the mean of its divisors is an integer number (8425000).

Almost surely, 2^16849999 is an apocalyptic number.

16849999 is a deficient number, since it is larger than the sum of its proper divisors (1).

16849999 is an equidigital number, since it uses as much as digits as its factorization.

16849999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 55.

The square root of 16849999 is about 4104.8750285484. The cubic root of 16849999 is about 256.3696594429.

The spelling of 16849999 in words is "sixteen million, eight hundred forty-nine thousand, nine hundred ninety-nine".