105077891 has 4 divisors (see below), whose sum is σ = 107917872. Its totient is φ = 102237912.

The previous prime is 105077857. The next prime is 105077897. The reversal of 105077891 is 198770501.

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 105077891 - 2⁶ = 105077827 is a prime.

It is a super-4 number, since 4×105077891⁴ (a number of 33 digits) contains 4444 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 (105077897) 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, 1419935 + ... + 1420008.

It is an arithmetic number, because the mean of its divisors is an integer number (26979468).

Almost surely, 2^105077891 is an apocalyptic number.

105077891 is a deficient number, since it is larger than the sum of its proper divisors (2839981).

105077891 is an equidigital number, since it uses as much as digits as its factorization.

105077891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839980.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 105077891 is about 10250.7507529937. The cubic root of 105077891 is about 471.8860250395.

The spelling of 105077891 in words is "one hundred five million, seventy-seven thousand, eight hundred ninety-one".