1616899 has 2 divisors, whose sum is σ = 1616900. Its totient is φ = 1616898.

The previous prime is 1616897. The next prime is 1616939. The reversal of 1616899 is 9986161.

It is an a-pointer prime, because the next prime (1616939) can be obtained adding 1616899 to its sum of digits (40).

It is a weak prime.

It is an emirp because it is prime and its reverse (9986161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1616899 - 2¹ = 1616897 is a prime.

It is a super-2 number, since 2×1616899² = 5228724752402, which contains 22 as substring.

Together with 1616897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1616891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808449 + 808450.

It is an arithmetic number, because the mean of its divisors is an integer number (808450).

2^1616899 is an apocalyptic number.

1616899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616899 is an equidigital number, since it uses as much as digits as its factorization.

1616899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 40.

The square root of 1616899 is about 1271.5734347650. The cubic root of 1616899 is about 117.3710430689.

The spelling of 1616899 in words is "one million, six hundred sixteen thousand, eight hundred ninety-nine".