91028827 has 2 divisors, whose sum is σ = 91028828. Its totient is φ = 91028826.

The previous prime is 91028809. The next prime is 91028831. The reversal of 91028827 is 72882019.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91028827 - 2¹⁹ = 90504539 is a prime.

It is not a weakly prime, because it can be changed into another prime (91028027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45514413 + 45514414.

It is an arithmetic number, because the mean of its divisors is an integer number (45514414).

Almost surely, 2^91028827 is an apocalyptic number.

91028827 is a deficient number, since it is larger than the sum of its proper divisors (1).

91028827 is an equidigital number, since it uses as much as digits as its factorization.

91028827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 91028827 is about 9540.9028398784. The cubic root of 91028827 is about 449.8416348092.

The spelling of 91028827 in words is "ninety-one million, twenty-eight thousand, eight hundred twenty-seven".