91854420941 has 2 divisors, whose sum is σ = 91854420942. Its totient is φ = 91854420940.

The previous prime is 91854420923. The next prime is 91854420953. The reversal of 91854420941 is 14902445819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88672332841 + 3182088100 = 297779^2 + 56410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91854420941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91854420841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45927210470 + 45927210471.

It is an arithmetic number, because the mean of its divisors is an integer number (45927210471).

Almost surely, 2^91854420941 is an apocalyptic number.

It is an amenable number.

91854420941 is a deficient number, since it is larger than the sum of its proper divisors (1).

91854420941 is an equidigital number, since it uses as much as digits as its factorization.

91854420941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 91854420941 in words is "ninety-one billion, eight hundred fifty-four million, four hundred twenty thousand, nine hundred forty-one".