105390917 has 4 divisors (see below), whose sum is σ = 108790656. Its totient is φ = 101991180.

The previous prime is 105390889. The next prime is 105390953. The reversal of 105390917 is 719093501.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105390917 is a prime.

It is a super-2 number, since 2×105390917² = 22214490772201778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105390517) 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, 1699823 + ... + 1699884.

It is an arithmetic number, because the mean of its divisors is an integer number (27197664).

Almost surely, 2^105390917 is an apocalyptic number.

It is an amenable number.

105390917 is a deficient number, since it is larger than the sum of its proper divisors (3399739).

105390917 is an equidigital number, since it uses as much as digits as its factorization.

105390917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399738.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 105390917 is about 10266.0078414153. The cubic root of 105390917 is about 472.3541417785.

The spelling of 105390917 in words is "one hundred five million, three hundred ninety thousand, nine hundred seventeen".