105378691 has 4 divisors (see below), whose sum is σ = 114958584. Its totient is φ = 95798800.

The previous prime is 105378683. The next prime is 105378719. The reversal of 105378691 is 196873501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105378691 - 2³ = 105378683 is a prime.

It is a super-2 number, since 2×105378691² = 22209337033746962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105378391) 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, 4789930 + ... + 4789951.

It is an arithmetic number, because the mean of its divisors is an integer number (28739646).

Almost surely, 2^105378691 is an apocalyptic number.

105378691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

105378691 is a deficient number, since it is larger than the sum of its proper divisors (9579893).

105378691 is an equidigital number, since it uses as much as digits as its factorization.

105378691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579892.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 105378691 is about 10265.4123638556. The cubic root of 105378691 is about 472.3358757355.

The spelling of 105378691 in words is "one hundred five million, three hundred seventy-eight thousand, six hundred ninety-one".