891342149 has 2 divisors, whose sum is σ = 891342150. Its totient is φ = 891342148.

The previous prime is 891342103. The next prime is 891342157. The reversal of 891342149 is 941243198.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851589124 + 39753025 = 29182^2 + 6305^2 .

It is a cyclic number.

It is not a de Polignac number, because 891342149 - 2¹² = 891338053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (891372149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445671074 + 445671075.

It is an arithmetic number, because the mean of its divisors is an integer number (445671075).

Almost surely, 2^891342149 is an apocalyptic number.

It is an amenable number.

891342149 is a deficient number, since it is larger than the sum of its proper divisors (1).

891342149 is an equidigital number, since it uses as much as digits as its factorization.

891342149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 891342149 is about 29855.3537744908. The cubic root of 891342149 is about 962.3834543542.

The spelling of 891342149 in words is "eight hundred ninety-one million, three hundred forty-two thousand, one hundred forty-nine".