106815691 has 4 divisors (see below), whose sum is σ = 106841592. Its totient is φ = 106789792.

The previous prime is 106815689. The next prime is 106815727. The reversal of 106815691 is 196518601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196518601 = 23 ⋅8544287.

It is a cyclic number.

It is not a de Polignac number, because 106815691 - 2¹ = 106815689 is a prime.

It is a super-2 number, since 2×106815691² = 22819183687614962, 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 106815691.

It is not an unprimeable number, because it can be changed into a prime (106815601) 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, 5230 + ... + 15523.

It is an arithmetic number, because the mean of its divisors is an integer number (26710398).

Almost surely, 2^106815691 is an apocalyptic number.

106815691 is a deficient number, since it is larger than the sum of its proper divisors (25901).

106815691 is an equidigital number, since it uses as much as digits as its factorization.

106815691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25900.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 106815691 is about 10335.1676812716. The cubic root of 106815691 is about 474.4731976794.

The spelling of 106815691 in words is "one hundred six million, eight hundred fifteen thousand, six hundred ninety-one".