89815841 has 2 divisors, whose sum is σ = 89815842. Its totient is φ = 89815840.

The previous prime is 89815837. The next prime is 89815931. The reversal of 89815841 is 14851898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88435216 + 1380625 = 9404^2 + 1175^2 .

It is a cyclic number.

It is not a de Polignac number, because 89815841 - 2² = 89815837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89815792 and 89815801.

It is not a weakly prime, because it can be changed into another prime (89815441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44907920 + 44907921.

It is an arithmetic number, because the mean of its divisors is an integer number (44907921).

Almost surely, 2^89815841 is an apocalyptic number.

It is an amenable number.

89815841 is a deficient number, since it is larger than the sum of its proper divisors (1).

89815841 is an equidigital number, since it uses as much as digits as its factorization.

89815841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 44.

The square root of 89815841 is about 9477.1219787444. The cubic root of 89815841 is about 447.8346025950.

The spelling of 89815841 in words is "eighty-nine million, eight hundred fifteen thousand, eight hundred forty-one".