89038981 has 2 divisors, whose sum is σ = 89038982. Its totient is φ = 89038980.

The previous prime is 89038969. The next prime is 89038991. The reversal of 89038981 is 18983098.

89038981 = T₇₇₀₃ + T₇₇₀₄ + T₇₇₀₅.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60202081 + 28836900 = 7759^2 + 5370^2 .

It is a cyclic number.

It is not a de Polignac number, because 89038981 - 2⁵ = 89038949 is a prime.

It is a super-2 number, since 2×89038981² = 15855880275036722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89038931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44519490 + 44519491.

It is an arithmetic number, because the mean of its divisors is an integer number (44519491).

Almost surely, 2^89038981 is an apocalyptic number.

89038981 is the 7705-th centered triangular number.

It is an amenable number.

89038981 is a deficient number, since it is larger than the sum of its proper divisors (1).

89038981 is an equidigital number, since it uses as much as digits as its factorization.

89038981 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 89038981 is about 9436.0468947542. The cubic root of 89038981 is about 446.5396836504.

The spelling of 89038981 in words is "eighty-nine million, thirty-eight thousand, nine hundred eighty-one".