91869119 has 2 divisors, whose sum is σ = 91869120. Its totient is φ = 91869118.

The previous prime is 91869103. The next prime is 91869143. The reversal of 91869119 is 91196819.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91869119 - 2⁴ = 91869103 is a prime.

It is a super-2 number, since 2×91869119² = 16879870051672322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91869119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91869619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45934559 + 45934560.

It is an arithmetic number, because the mean of its divisors is an integer number (45934560).

Almost surely, 2^91869119 is an apocalyptic number.

91869119 is a deficient number, since it is larger than the sum of its proper divisors (1).

91869119 is an equidigital number, since it uses as much as digits as its factorization.

91869119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 44.

The square root of 91869119 is about 9584.8379746347. The cubic root of 91869119 is about 451.2215681782.

The spelling of 91869119 in words is "ninety-one million, eight hundred sixty-nine thousand, one hundred nineteen".