89387861 has 2 divisors, whose sum is σ = 89387862. Its totient is φ = 89387860.

The previous prime is 89387827. The next prime is 89387869. The reversal of 89387861 is 16878398.

It is a happy number.

89387861 is nontrivially palindromic in base 16.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77616100 + 11771761 = 8810^2 + 3431^2 .

It is a cyclic number.

It is not a de Polignac number, because 89387861 - 2⁶ = 89387797 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 (89387869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44693930 + 44693931.

It is an arithmetic number, because the mean of its divisors is an integer number (44693931).

Almost surely, 2^89387861 is an apocalyptic number.

It is an amenable number.

89387861 is a deficient number, since it is larger than the sum of its proper divisors (1).

89387861 is an equidigital number, since it uses as much as digits as its factorization.

89387861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 89387861 is about 9454.5153762633. The cubic root of 89387861 is about 447.1221466346.

The spelling of 89387861 in words is "eighty-nine million, three hundred eighty-seven thousand, eight hundred sixty-one".