91058972449 has 2 divisors, whose sum is σ = 91058972450. Its totient is φ = 91058972448.

The previous prime is 91058972413. The next prime is 91058972483. The reversal of 91058972449 is 94427985019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76268764224 + 14790208225 = 276168^2 + 121615^2 .

It is a cyclic number.

It is not a de Polignac number, because 91058972449 - 2²⁷ = 90924754721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91058972393 and 91058972402.

It is not a weakly prime, because it can be changed into another prime (91058972149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45529486224 + 45529486225.

It is an arithmetic number, because the mean of its divisors is an integer number (45529486225).

Almost surely, 2^91058972449 is an apocalyptic number.

It is an amenable number.

91058972449 is a deficient number, since it is larger than the sum of its proper divisors (1).

91058972449 is an equidigital number, since it uses as much as digits as its factorization.

91058972449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 91058972449 in words is "ninety-one billion, fifty-eight million, nine hundred seventy-two thousand, four hundred forty-nine".