16427857 has 2 divisors, whose sum is σ = 16427858. Its totient is φ = 16427856.

The previous prime is 16427843. The next prime is 16427869. The reversal of 16427857 is 75872461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9024016 + 7403841 = 3004^2 + 2721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16427857 is a prime.

It is a super-2 number, since 2×16427857² = 539748971224898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16427897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8213928 + 8213929.

It is an arithmetic number, because the mean of its divisors is an integer number (8213929).

Almost surely, 2^16427857 is an apocalyptic number.

It is an amenable number.

16427857 is a deficient number, since it is larger than the sum of its proper divisors (1).

16427857 is an equidigital number, since it uses as much as digits as its factorization.

16427857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 40.

The square root of 16427857 is about 4053.1292848859. The cubic root of 16427857 is about 254.2105896083.

The spelling of 16427857 in words is "sixteen million, four hundred twenty-seven thousand, eight hundred fifty-seven".