16670869 has 2 divisors, whose sum is σ = 16670870. Its totient is φ = 16670868.

The previous prime is 16670867. The next prime is 16670879. The reversal of 16670869 is 96807661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11662225 + 5008644 = 3415^2 + 2238^2 .

It is a cyclic number.

It is not a de Polignac number, because 16670869 - 2¹ = 16670867 is a prime.

It is a super-2 number, since 2×16670869² = 555835746430322, which contains 22 as substring.

Together with 16670867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16670861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8335434 + 8335435.

It is an arithmetic number, because the mean of its divisors is an integer number (8335435).

Almost surely, 2^16670869 is an apocalyptic number.

It is an amenable number.

16670869 is a deficient number, since it is larger than the sum of its proper divisors (1).

16670869 is an equidigital number, since it uses as much as digits as its factorization.

16670869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 16670869 is about 4082.9975508197. The cubic root of 16670869 is about 255.4579442449.

The spelling of 16670869 in words is "sixteen million, six hundred seventy thousand, eight hundred sixty-nine".