91000001039 has 2 divisors, whose sum is σ = 91000001040. Its totient is φ = 91000001038.

The previous prime is 91000001017. The next prime is 91000001051. The reversal of 91000001039 is 93010000019.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91000001039 - 2¹⁶ = 90999935503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91000001089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45500000519 + 45500000520.

It is an arithmetic number, because the mean of its divisors is an integer number (45500000520).

Almost surely, 2^91000001039 is an apocalyptic number.

91000001039 is a deficient number, since it is larger than the sum of its proper divisors (1).

91000001039 is an equidigital number, since it uses as much as digits as its factorization.

91000001039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 23.

The spelling of 91000001039 in words is "ninety-one billion, one thousand, thirty-nine".