89668879 has 2 divisors, whose sum is σ = 89668880. Its totient is φ = 89668878.

The previous prime is 89668861. The next prime is 89668883. The reversal of 89668879 is 97886698.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89668879 - 2⁹ = 89668367 is a prime.

It is a super-2 number, since 2×89668879² = 16081015722233282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89668979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44834439 + 44834440.

It is an arithmetic number, because the mean of its divisors is an integer number (44834440).

Almost surely, 2^89668879 is an apocalyptic number.

89668879 is a deficient number, since it is larger than the sum of its proper divisors (1).

89668879 is an equidigital number, since it uses as much as digits as its factorization.

89668879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 61.

The square root of 89668879 is about 9469.3652902399. The cubic root of 89668879 is about 447.5902114147.

The spelling of 89668879 in words is "eighty-nine million, six hundred sixty-eight thousand, eight hundred seventy-nine".