91982887 has 2 divisors, whose sum is σ = 91982888. Its totient is φ = 91982886.

The previous prime is 91982879. The next prime is 91982899. The reversal of 91982887 is 78828919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91982887 - 2³ = 91982879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91982587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45991443 + 45991444.

It is an arithmetic number, because the mean of its divisors is an integer number (45991444).

Almost surely, 2^91982887 is an apocalyptic number.

91982887 is a deficient number, since it is larger than the sum of its proper divisors (1).

91982887 is an equidigital number, since it uses as much as digits as its factorization.

91982887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 52.

The square root of 91982887 is about 9590.7709283456. The cubic root of 91982887 is about 451.4077511600.

The spelling of 91982887 in words is "ninety-one million, nine hundred eighty-two thousand, eight hundred eighty-seven".