91000727 has 2 divisors, whose sum is σ = 91000728. Its totient is φ = 91000726.

The previous prime is 91000699. The next prime is 91000729. The reversal of 91000727 is 72700019.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91000727 - 2²⁴ = 74223511 is a prime.

It is a super-2 number, since 2×91000727² = 16562264629057058, which contains 22 as substring.

Together with 91000729, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91000696 and 91000705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91000729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45500363 + 45500364.

It is an arithmetic number, because the mean of its divisors is an integer number (45500364).

Almost surely, 2^91000727 is an apocalyptic number.

91000727 is a deficient number, since it is larger than the sum of its proper divisors (1).

91000727 is an equidigital number, since it uses as much as digits as its factorization.

91000727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 91000727 is about 9539.4301192472. The cubic root of 91000727 is about 449.7953423278.

The spelling of 91000727 in words is "ninety-one million, seven hundred twenty-seven", and thus it is an aban number.