891240373451 has 2 divisors, whose sum is σ = 891240373452. Its totient is φ = 891240373450.

The previous prime is 891240373427. The next prime is 891240373453. The reversal of 891240373451 is 154373042198.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 891240373451 - 2¹⁴ = 891240357067 is a prime.

Together with 891240373453, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 891240373396 and 891240373405.

It is not a weakly prime, because it can be changed into another prime (891240373453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445620186725 + 445620186726.

It is an arithmetic number, because the mean of its divisors is an integer number (445620186726).

Almost surely, 2^891240373451 is an apocalyptic number.

891240373451 is a deficient number, since it is larger than the sum of its proper divisors (1).

891240373451 is an equidigital number, since it uses as much as digits as its factorization.

891240373451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 891240373451 in words is "eight hundred ninety-one billion, two hundred forty million, three hundred seventy-three thousand, four hundred fifty-one".