106898021 has 4 divisors (see below), whose sum is σ = 106921932. Its totient is φ = 106874112.

The previous prime is 106897993. The next prime is 106898027. The reversal of 106898021 is 120898601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120898601 = 5077 ⋅23813.

It can be written as a sum of positive squares in 2 ways, for example, as 57547396 + 49350625 = 7586^2 + 7025^2 .

It is a cyclic number.

It is not a de Polignac number, because 106898021 - 2¹⁰ = 106896997 is a prime.

It is a super-2 number, since 2×106898021² = 22854373787432882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106898027) 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, 3026 + ... + 14931.

It is an arithmetic number, because the mean of its divisors is an integer number (26730483).

Almost surely, 2^106898021 is an apocalyptic number.

It is an amenable number.

106898021 is a deficient number, since it is larger than the sum of its proper divisors (23911).

106898021 is an equidigital number, since it uses as much as digits as its factorization.

106898021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23910.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 106898021 is about 10339.1499167001. The cubic root of 106898021 is about 474.5950691199.

The spelling of 106898021 in words is "one hundred six million, eight hundred ninety-eight thousand, twenty-one".