89476991 has 2 divisors, whose sum is σ = 89476992. Its totient is φ = 89476990.

The previous prime is 89476987. The next prime is 89476999. The reversal of 89476991 is 19967498.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89476991 - 2² = 89476987 is a prime.

It is a super-2 number, since 2×89476991² = 16012263836828162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89476999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44738495 + 44738496.

It is an arithmetic number, because the mean of its divisors is an integer number (44738496).

Almost surely, 2^89476991 is an apocalyptic number.

89476991 is a deficient number, since it is larger than the sum of its proper divisors (1).

89476991 is an equidigital number, since it uses as much as digits as its factorization.

89476991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 89476991 is about 9459.2278226079. The cubic root of 89476991 is about 447.2707080393.

The spelling of 89476991 in words is "eighty-nine million, four hundred seventy-six thousand, nine hundred ninety-one".