880249561 has 3 divisors (see below), whose sum is σ = 880279231. Its totient is φ = 880219892.

The previous prime is 880249543. The next prime is 880249567. The reversal of 880249561 is 165942088.

It is a happy number.

The square root of 880249561 is 29669.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 17065161 + 863184400 = 4131^2 + 29380^2 .

It is not a de Polignac number, because 880249561 - 2¹⁵ = 880216793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (880249567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14835 + ... + 44503.

Almost surely, 2^880249561 is an apocalyptic number.

880249561 is the 29669-th square number.

880249561 is the 14835-th centered octagonal number.

It is an amenable number.

880249561 is a deficient number, since it is larger than the sum of its proper divisors (29670).

880249561 is an frugal number, since it uses more digits than its factorization.

880249561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59338 (or 29669 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The cubic root of 880249561 is about 958.3745500878.

The spelling of 880249561 in words is "eight hundred eighty million, two hundred forty-nine thousand, five hundred sixty-one".