89615681893 has 2 divisors, whose sum is σ = 89615681894. Its totient is φ = 89615681892.

The previous prime is 89615681867. The next prime is 89615681929. The reversal of 89615681893 is 39818651698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80950492324 + 8665189569 = 284518^2 + 93087^2 .

It is a cyclic number.

It is not a de Polignac number, because 89615681893 - 2⁵ = 89615681861 is a prime.

It is a super-2 number, since 2×89615681893² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89615681833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44807840946 + 44807840947.

It is an arithmetic number, because the mean of its divisors is an integer number (44807840947).

Almost surely, 2^89615681893 is an apocalyptic number.

It is an amenable number.

89615681893 is a deficient number, since it is larger than the sum of its proper divisors (1).

89615681893 is an equidigital number, since it uses as much as digits as its factorization.

89615681893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 64.

The spelling of 89615681893 in words is "eighty-nine billion, six hundred fifteen million, six hundred eighty-one thousand, eight hundred ninety-three".