91867063 has 2 divisors, whose sum is σ = 91867064. Its totient is φ = 91867062.

The previous prime is 91867021. The next prime is 91867067. The reversal of 91867063 is 36076819.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91867063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91867067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45933531 + 45933532.

It is an arithmetic number, because the mean of its divisors is an integer number (45933532).

Almost surely, 2^91867063 is an apocalyptic number.

91867063 is a deficient number, since it is larger than the sum of its proper divisors (1).

91867063 is an equidigital number, since it uses as much as digits as its factorization.

91867063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 91867063 is about 9584.7307213088. The cubic root of 91867063 is about 451.2182020907.

The spelling of 91867063 in words is "ninety-one million, eight hundred sixty-seven thousand, sixty-three".