106998091 has 4 divisors (see below), whose sum is σ = 107065800. Its totient is φ = 106930384.

The previous prime is 106998079. The next prime is 106998103. The reversal of 106998091 is 190899601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190899601 = 113 ⋅1689377.

It is an interprime number because it is at equal distance from previous prime (106998079) and next prime (106998103).

It is a cyclic number.

It is not a de Polignac number, because 106998091 - 2¹³ = 106989899 is a prime.

It is a super-2 number, since 2×106998091² = 22897182955288562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106998011) 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, 31426 + ... + 34663.

It is an arithmetic number, because the mean of its divisors is an integer number (26766450).

Almost surely, 2^106998091 is an apocalyptic number.

106998091 is a deficient number, since it is larger than the sum of its proper divisors (67709).

106998091 is an equidigital number, since it uses as much as digits as its factorization.

106998091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67708.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 106998091 is about 10343.9881573791. The cubic root of 106998091 is about 474.7431165022.

The spelling of 106998091 in words is "one hundred six million, nine hundred ninety-eight thousand, ninety-one".