105954781 has 2 divisors, whose sum is σ = 105954782. Its totient is φ = 105954780.

The previous prime is 105954769. The next prime is 105954787. The reversal of 105954781 is 187459501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104652900 + 1301881 = 10230^2 + 1141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105954781 is a prime.

It is a super-2 number, since 2×105954781² = 22452831233515922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105954787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52977390 + 52977391.

It is an arithmetic number, because the mean of its divisors is an integer number (52977391).

Almost surely, 2^105954781 is an apocalyptic number.

It is an amenable number.

105954781 is a deficient number, since it is larger than the sum of its proper divisors (1).

105954781 is an equidigital number, since it uses as much as digits as its factorization.

105954781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 105954781 is about 10293.4338779632. The cubic root of 105954781 is about 473.1950425315.

It can be divided in two parts, 10595 and 4781, that added together give a square (15376 = 124²).

The spelling of 105954781 in words is "one hundred five million, nine hundred fifty-four thousand, seven hundred eighty-one".