88186561 has 2 divisors, whose sum is σ = 88186562. Its totient is φ = 88186560.

The previous prime is 88186513. The next prime is 88186573. The reversal of 88186561 is 16568188.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87890625 + 295936 = 9375^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 88186561 - 2¹¹ = 88184513 is a prime.

It is not a weakly prime, because it can be changed into another prime (88184561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44093280 + 44093281.

It is an arithmetic number, because the mean of its divisors is an integer number (44093281).

Almost surely, 2^88186561 is an apocalyptic number.

It is an amenable number.

88186561 is a deficient number, since it is larger than the sum of its proper divisors (1).

88186561 is an equidigital number, since it uses as much as digits as its factorization.

88186561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 43.

The square root of 88186561 is about 9390.7699897293. The cubic root of 88186561 is about 445.1101204558.

The spelling of 88186561 in words is "eighty-eight million, one hundred eighty-six thousand, five hundred sixty-one".