91028423 has 2 divisors, whose sum is σ = 91028424. Its totient is φ = 91028422.

The previous prime is 91028383. The next prime is 91028429. The reversal of 91028423 is 32482019.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91028423 - 2¹⁴ = 91012039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91028429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45514211 + 45514212.

It is an arithmetic number, because the mean of its divisors is an integer number (45514212).

Almost surely, 2^91028423 is an apocalyptic number.

91028423 is a deficient number, since it is larger than the sum of its proper divisors (1).

91028423 is an equidigital number, since it uses as much as digits as its factorization.

91028423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 91028423 is about 9540.8816678544. The cubic root of 91028423 is about 449.8409693193.

The spelling of 91028423 in words is "ninety-one million, twenty-eight thousand, four hundred twenty-three".