89487869 has 2 divisors, whose sum is σ = 89487870. Its totient is φ = 89487868.

The previous prime is 89487863. The next prime is 89487877. The reversal of 89487869 is 96878498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55323844 + 34164025 = 7438^2 + 5845^2 .

It is a cyclic number.

It is not a de Polignac number, because 89487869 - 2¹² = 89483773 is a prime.

It is a super-2 number, since 2×89487869² = 16016157396322322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89487863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44743934 + 44743935.

It is an arithmetic number, because the mean of its divisors is an integer number (44743935).

Almost surely, 2^89487869 is an apocalyptic number.

It is an amenable number.

89487869 is a deficient number, since it is larger than the sum of its proper divisors (1).

89487869 is an equidigital number, since it uses as much as digits as its factorization.

89487869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 59.

The square root of 89487869 is about 9459.8027992131. The cubic root of 89487869 is about 447.2888326750.

The spelling of 89487869 in words is "eighty-nine million, four hundred eighty-seven thousand, eight hundred sixty-nine".