88684991 has 2 divisors, whose sum is σ = 88684992. Its totient is φ = 88684990.

The previous prime is 88684979. The next prime is 88684997. The reversal of 88684991 is 19948688.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 88684991 - 2¹⁸ = 88422847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88684997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44342495 + 44342496.

It is an arithmetic number, because the mean of its divisors is an integer number (44342496).

Almost surely, 2^88684991 is an apocalyptic number.

88684991 is a deficient number, since it is larger than the sum of its proper divisors (1).

88684991 is an equidigital number, since it uses as much as digits as its factorization.

88684991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 53.

The square root of 88684991 is about 9417.2708891695. The cubic root of 88684991 is about 445.9471322240.

The spelling of 88684991 in words is "eighty-eight million, six hundred eighty-four thousand, nine hundred ninety-one".