91924000409 has 2 divisors, whose sum is σ = 91924000410. Its totient is φ = 91924000408.

The previous prime is 91924000297. The next prime is 91924000417. The reversal of 91924000409 is 90400042919.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63614928400 + 28309072009 = 252220^2 + 168253^2 .

It is a cyclic number.

It is not a de Polignac number, because 91924000409 - 2⁸ = 91924000153 is a prime.

It is not a weakly prime, because it can be changed into another prime (91924000439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45962000204 + 45962000205.

It is an arithmetic number, because the mean of its divisors is an integer number (45962000205).

Almost surely, 2^91924000409 is an apocalyptic number.

It is an amenable number.

91924000409 is a deficient number, since it is larger than the sum of its proper divisors (1).

91924000409 is an equidigital number, since it uses as much as digits as its factorization.

91924000409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 91924000409 in words is "ninety-one billion, nine hundred twenty-four million, four hundred nine", and thus it is an aban number.