88561669 has 12 divisors (see below), whose sum is σ = 103476204. Its totient is φ = 75574464.

The previous prime is 88561667. The next prime is 88561673. The reversal of 88561669 is 96616588.

It can be written as a sum of positive squares in 2 ways, for example, as 45724644 + 42837025 = 6762^2 + 6545^2 .

It is not a de Polignac number, because 88561669 - 2¹ = 88561667 is a prime.

It is a super-2 number, since 2×88561669² = 15686338432131122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88561663) 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 in 11 ways as a sum of consecutive naturals, for example, 7539 + ... + 15295.

It is an arithmetic number, because the mean of its divisors is an integer number (8623017).

Almost surely, 2^88561669 is an apocalyptic number.

It is an amenable number.

88561669 is a deficient number, since it is larger than the sum of its proper divisors (14914535).

88561669 is a wasteful number, since it uses less digits than its factorization.

88561669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8004 (or 7997 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 88561669 is about 9410.7209606916. The cubic root of 88561669 is about 445.7403305894.

The spelling of 88561669 in words is "eighty-eight million, five hundred sixty-one thousand, six hundred sixty-nine".