106658993 has 4 divisors (see below), whose sum is σ = 121896000. Its totient is φ = 91421988.

The previous prime is 106658987. The next prime is 106659011. The reversal of 106658993 is 399856601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 106658993 - 2¹² = 106654897 is a prime.

It is a super-3 number, since 3×106658993³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106658953) 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, 7618493 + ... + 7618506.

It is an arithmetic number, because the mean of its divisors is an integer number (30474000).

Almost surely, 2^106658993 is an apocalyptic number.

It is an amenable number.

106658993 is a deficient number, since it is larger than the sum of its proper divisors (15237007).

106658993 is an equidigital number, since it uses as much as digits as its factorization.

106658993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15237006.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 106658993 is about 10327.5840834147. The cubic root of 106658993 is about 474.2410676536.

The spelling of 106658993 in words is "one hundred six million, six hundred fifty-eight thousand, nine hundred ninety-three".