1616879189 has 2 divisors, whose sum is σ = 1616879190. Its totient is φ = 1616879188.

The previous prime is 1616879167. The next prime is 1616879191. The reversal of 1616879189 is 9819786161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1611380164 + 5499025 = 40142^2 + 2345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616879189 - 2¹² = 1616875093 is a prime.

It is a super-2 number, since 2×1616879189² = 5228596623642595442, which contains 22 as substring.

Together with 1616879191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1616879389) 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, 808439594 + 808439595.

It is an arithmetic number, because the mean of its divisors is an integer number (808439595).

Almost surely, 2^1616879189 is an apocalyptic number.

It is an amenable number.

1616879189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616879189 is an equidigital number, since it uses as much as digits as its factorization.

1616879189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 56.

The square root of 1616879189 is about 40210.4363194432. The cubic root of 1616879189 is about 1173.7056370533.

The spelling of 1616879189 in words is "one billion, six hundred sixteen million, eight hundred seventy-nine thousand, one hundred eighty-nine".