891190145 has 8 divisors (see below), whose sum is σ = 1095512040. Its totient is φ = 695562880.

The previous prime is 891190129. The next prime is 891190151. The reversal of 891190145 is 541091198.

It can be written as a sum of positive squares in 4 ways, for example, as 13075456 + 878114689 = 3616^2 + 29633^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 891190145 - 2⁴ = 891190129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 891190099 and 891190108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2173430 + ... + 2173839.

It is an arithmetic number, because the mean of its divisors is an integer number (136939005).

Almost surely, 2^891190145 is an apocalyptic number.

It is an amenable number.

891190145 is a deficient number, since it is larger than the sum of its proper divisors (204321895).

891190145 is a wasteful number, since it uses less digits than its factorization.

891190145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4347315.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 891190145 is about 29852.8079918791. The cubic root of 891190145 is about 962.3287449286.

The spelling of 891190145 in words is "eight hundred ninety-one million, one hundred ninety thousand, one hundred forty-five".