89649691 has 2 divisors, whose sum is σ = 89649692. Its totient is φ = 89649690.

The previous prime is 89649689. The next prime is 89649697. The reversal of 89649691 is 19694698.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89649691 - 2¹ = 89649689 is a prime.

Together with 89649689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (89649697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44824845 + 44824846.

It is an arithmetic number, because the mean of its divisors is an integer number (44824846).

Almost surely, 2^89649691 is an apocalyptic number.

89649691 is a deficient number, since it is larger than the sum of its proper divisors (1).

89649691 is an equidigital number, since it uses as much as digits as its factorization.

89649691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 52.

The square root of 89649691 is about 9468.3520741468. The cubic root of 89649691 is about 447.5582829324.

The spelling of 89649691 in words is "eighty-nine million, six hundred forty-nine thousand, six hundred ninety-one".