16427977 has 4 divisors (see below), whose sum is σ = 16454016. Its totient is φ = 16401940.

The previous prime is 16427897. The next prime is 16427981. The reversal of 16427977 is 77972461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16427977 - 2¹⁵ = 16395209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16427987) 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, 12049 + ... + 13342.

It is an arithmetic number, because the mean of its divisors is an integer number (4113504).

Almost surely, 2^16427977 is an apocalyptic number.

It is an amenable number.

16427977 is a deficient number, since it is larger than the sum of its proper divisors (26039).

16427977 is an equidigital number, since it uses as much as digits as its factorization.

16427977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26038.

The product of its digits is 148176, while the sum is 43.

The square root of 16427977 is about 4053.1440882357. The cubic root of 16427977 is about 254.2112085812.

The spelling of 16427977 in words is "sixteen million, four hundred twenty-seven thousand, nine hundred seventy-seven".