91118371 has 2 divisors, whose sum is σ = 91118372. Its totient is φ = 91118370.

The previous prime is 91118327. The next prime is 91118389. The reversal of 91118371 is 17381119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91118371 - 2¹¹ = 91116323 is a prime.

It is not a weakly prime, because it can be changed into another prime (91118171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45559185 + 45559186.

It is an arithmetic number, because the mean of its divisors is an integer number (45559186).

Almost surely, 2^91118371 is an apocalyptic number.

91118371 is a deficient number, since it is larger than the sum of its proper divisors (1).

91118371 is an equidigital number, since it uses as much as digits as its factorization.

91118371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 31.

The square root of 91118371 is about 9545.5943240848. The cubic root of 91118371 is about 449.9890878012.

It can be divided in two parts, 91 and 118371, that multiplied together give a triangular number (10771761 = T₄₆₄₁).

The spelling of 91118371 in words is "ninety-one million, one hundred eighteen thousand, three hundred seventy-one".