91961711 has 2 divisors, whose sum is σ = 91961712. Its totient is φ = 91961710.

The previous prime is 91961669. The next prime is 91961713. The reversal of 91961711 is 11716919.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91961711 - 2¹⁴ = 91945327 is a prime.

It is a super-3 number, since 3×91961711³ (a number of 25 digits) contains 333 as substring.

Together with 91961713, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91961713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45980855 + 45980856.

It is an arithmetic number, because the mean of its divisors is an integer number (45980856).

Almost surely, 2^91961711 is an apocalyptic number.

91961711 is a deficient number, since it is larger than the sum of its proper divisors (1).

91961711 is an equidigital number, since it uses as much as digits as its factorization.

91961711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 35.

The square root of 91961711 is about 9589.6668868110. Note that the first 3 decimals coincide. The cubic root of 91961711 is about 451.3731079617.

The spelling of 91961711 in words is "ninety-one million, nine hundred sixty-one thousand, seven hundred eleven".