91019323 has 2 divisors, whose sum is σ = 91019324. Its totient is φ = 91019322.

The previous prime is 91019311. The next prime is 91019333. The reversal of 91019323 is 32391019.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91019323 - 2¹³ = 91011131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91019291 and 91019300.

It is not a weakly prime, because it can be changed into another prime (91019333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45509661 + 45509662.

It is an arithmetic number, because the mean of its divisors is an integer number (45509662).

Almost surely, 2^91019323 is an apocalyptic number.

91019323 is a deficient number, since it is larger than the sum of its proper divisors (1).

91019323 is an equidigital number, since it uses as much as digits as its factorization.

91019323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 91019323 is about 9540.4047608055. The cubic root of 91019323 is about 449.8259788028.

The spelling of 91019323 in words is "ninety-one million, nineteen thousand, three hundred twenty-three".