16119857 has 4 divisors (see below), whose sum is σ = 17359860. Its totient is φ = 14879856.

The previous prime is 16119839. The next prime is 16119877. The reversal of 16119857 is 75891161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4532641 + 11587216 = 2129^2 + 3404^2 .

It is a cyclic number.

It is not a de Polignac number, because 16119857 - 2⁶ = 16119793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16119857.

It is not an unprimeable number, because it can be changed into a prime (16119877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619982 + ... + 620007.

It is an arithmetic number, because the mean of its divisors is an integer number (4339965).

Almost surely, 2^16119857 is an apocalyptic number.

It is an amenable number.

16119857 is a deficient number, since it is larger than the sum of its proper divisors (1240003).

16119857 is a wasteful number, since it uses less digits than its factorization.

16119857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240002.

The product of its digits is 15120, while the sum is 38.

The square root of 16119857 is about 4014.9541715940. The cubic root of 16119857 is about 252.6118551571.

The spelling of 16119857 in words is "sixteen million, one hundred nineteen thousand, eight hundred fifty-seven".