89089813 has 2 divisors, whose sum is σ = 89089814. Its totient is φ = 89089812.

The previous prime is 89089811. The next prime is 89089853. The reversal of 89089813 is 31898098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46553329 + 42536484 = 6823^2 + 6522^2 .

It is a cyclic number.

It is not a de Polignac number, because 89089813 - 2¹ = 89089811 is a prime.

Together with 89089811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89089811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44544906 + 44544907.

It is an arithmetic number, because the mean of its divisors is an integer number (44544907).

Almost surely, 2^89089813 is an apocalyptic number.

It is an amenable number.

89089813 is a deficient number, since it is larger than the sum of its proper divisors (1).

89089813 is an equidigital number, since it uses as much as digits as its factorization.

89089813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 89089813 is about 9438.7400112515. The cubic root of 89089813 is about 446.6246433943.

It can be divided in two parts, 8908 and 9813, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 89089813 in words is "eighty-nine million, eighty-nine thousand, eight hundred thirteen".