16900000691 has 4 divisors (see below), whose sum is σ = 19314286512. Its totient is φ = 14485714872.

The previous prime is 16900000687. The next prime is 16900000693. The reversal of 16900000691 is 19600000961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19600000961 = 17 ⋅1152941233.

It is a cyclic number.

It is not a de Polignac number, because 16900000691 - 2² = 16900000687 is a prime.

It is a super-2 number, since 2×16900000691² (a number of 21 digits) contains 22 as substring.

16900000691 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16900000693) 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, 1207142900 + ... + 1207142913.

It is an arithmetic number, because the mean of its divisors is an integer number (4828571628).

Almost surely, 2^16900000691 is an apocalyptic number.

16900000691 is a deficient number, since it is larger than the sum of its proper divisors (2414285821).

16900000691 is an equidigital number, since it uses as much as digits as its factorization.

16900000691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414285820.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 16900000691 in words is "sixteen billion, nine hundred million, six hundred ninety-one", and thus it is an aban number.