891345377 has 18 divisors (see below), whose sum is σ = 1023798258. Its totient is φ = 772991232.

The previous prime is 891345349. The next prime is 891345397. The reversal of 891345377 is 773543198.

It can be written as a sum of positive squares in 9 ways, for example, as 722319376 + 169026001 = 26876^2 + 13001^2 .

It is not a de Polignac number, because 891345377 - 2⁶ = 891345313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891345317) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1599983 + ... + 1600539.

It is an arithmetic number, because the mean of its divisors is an integer number (56877681).

Almost surely, 2^891345377 is an apocalyptic number.

It is an amenable number.

891345377 is a deficient number, since it is larger than the sum of its proper divisors (132452881).

891345377 is an equidigital number, since it uses as much as digits as its factorization.

891345377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 587 counting only the distinct ones).

The product of its digits is 635040, while the sum is 47.

The square root of 891345377 is about 29855.4078350975. The cubic root of 891345377 is about 962.3846161116.

The spelling of 891345377 in words is "eight hundred ninety-one million, three hundred forty-five thousand, three hundred seventy-seven".