88189561 has 4 divisors (see below), whose sum is σ = 88250512. Its totient is φ = 88128612.

The previous prime is 88189559. The next prime is 88189573. The reversal of 88189561 is 16598188.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 88189561 - 2¹ = 88189559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88184561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28251 + ... + 31216.

It is an arithmetic number, because the mean of its divisors is an integer number (22062628).

Almost surely, 2^88189561 is an apocalyptic number.

It is an amenable number.

88189561 is a deficient number, since it is larger than the sum of its proper divisors (60951).

88189561 is a wasteful number, since it uses less digits than its factorization.

88189561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60950.

The product of its digits is 138240, while the sum is 46.

The square root of 88189561 is about 9390.9297196816. The cubic root of 88189561 is about 445.1151677676.

The spelling of 88189561 in words is "eighty-eight million, one hundred eighty-nine thousand, five hundred sixty-one".