16670431 has 4 divisors (see below), whose sum is σ = 16711600. Its totient is φ = 16629264.

The previous prime is 16670413. The next prime is 16670473. The reversal of 16670431 is 13407661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13407661 = 239 ⋅56099.

It is a cyclic number.

It is not a de Polignac number, because 16670431 - 2⁵ = 16670399 is a prime.

It is a super-2 number, since 2×16670431² = 555806539451522, which contains 22 as substring.

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 16670431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16670411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19971 + ... + 20788.

It is an arithmetic number, because the mean of its divisors is an integer number (4177900).

Almost surely, 2^16670431 is an apocalyptic number.

16670431 is a deficient number, since it is larger than the sum of its proper divisors (41169).

16670431 is an equidigital number, since it uses as much as digits as its factorization.

16670431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41168.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 16670431 is about 4082.9439134037. The cubic root of 16670431 is about 255.4557069778.

The spelling of 16670431 in words is "sixteen million, six hundred seventy thousand, four hundred thirty-one".