891353091 has 4 divisors (see below), whose sum is σ = 1188470792. Its totient is φ = 594235392.

The previous prime is 891353081. The next prime is 891353101. The reversal of 891353091 is 190353198.

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

It is an interprime number because it is at equal distance from previous prime (891353081) and next prime (891353101).

It is not a de Polignac number, because 891353091 - 2¹⁰ = 891352067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891353011) 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, 148558846 + ... + 148558851.

It is an arithmetic number, because the mean of its divisors is an integer number (297117698).

Almost surely, 2^891353091 is an apocalyptic number.

891353091 is a deficient number, since it is larger than the sum of its proper divisors (297117701).

891353091 is a wasteful number, since it uses less digits than its factorization.

891353091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297117700.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 891353091 is about 29855.5370241434. The cubic root of 891353091 is about 962.3873923694.

The spelling of 891353091 in words is "eight hundred ninety-one million, three hundred fifty-three thousand, ninety-one".