16119881 has 2 divisors, whose sum is σ = 16119882. Its totient is φ = 16119880.

The previous prime is 16119877. The next prime is 16119889. The reversal of 16119881 is 18891161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13623481 + 2496400 = 3691^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 16119881 - 2² = 16119877 is a prime.

It is a super-2 number, since 2×16119881² = 519701126908322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16119889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8059940 + 8059941.

It is an arithmetic number, because the mean of its divisors is an integer number (8059941).

Almost surely, 2^16119881 is an apocalyptic number.

It is an amenable number.

16119881 is a deficient number, since it is larger than the sum of its proper divisors (1).

16119881 is an equidigital number, since it uses as much as digits as its factorization.

16119881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 35.

The square root of 16119881 is about 4014.9571604190. The cubic root of 16119881 is about 252.6119805238.

The spelling of 16119881 in words is "sixteen million, one hundred nineteen thousand, eight hundred eighty-one".