91001941 has 2 divisors, whose sum is σ = 91001942. Its totient is φ = 91001940.

The previous prime is 91001927. The next prime is 91001959. The reversal of 91001941 is 14910019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86881041 + 4120900 = 9321^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 91001941 - 2⁹ = 91001429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91001341) 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, 45500970 + 45500971.

It is an arithmetic number, because the mean of its divisors is an integer number (45500971).

Almost surely, 2^91001941 is an apocalyptic number.

It is an amenable number.

91001941 is a deficient number, since it is larger than the sum of its proper divisors (1).

91001941 is an equidigital number, since it uses as much as digits as its factorization.

91001941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 91001941 is about 9539.4937496704. The cubic root of 91001941 is about 449.7973424917.

The spelling of 91001941 in words is "ninety-one million, one thousand, nine hundred forty-one".