16211977 has 8 divisors (see below), whose sum is σ = 16846592. Its totient is φ = 15584400.

The previous prime is 16211971. The next prime is 16212013. The reversal of 16211977 is 77911261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16211977 - 2²³ = 7823369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16211971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3202 + ... + 6532.

It is an arithmetic number, because the mean of its divisors is an integer number (2105824).

Almost surely, 2^16211977 is an apocalyptic number.

It is an amenable number.

16211977 is a deficient number, since it is larger than the sum of its proper divisors (634615).

16211977 is a wasteful number, since it uses less digits than its factorization.

16211977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3519.

The product of its digits is 5292, while the sum is 34.

The square root of 16211977 is about 4026.4099393877. The cubic root of 16211977 is about 253.0921409767.

The spelling of 16211977 in words is "sixteen million, two hundred eleven thousand, nine hundred seventy-seven".