561626929 has 4 divisors (see below), whose sum is σ = 564288880. Its totient is φ = 558964980.

The previous prime is 561626927. The next prime is 561626941. The reversal of 561626929 is 929626165.

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 561626929 - 2¹ = 561626927 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561626921) 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 3 ways as a sum of consecutive naturals, for example, 1330659 + ... + 1331080.

It is an arithmetic number, because the mean of its divisors is an integer number (141072220).

Almost surely, 2^561626929 is an apocalyptic number.

It is an amenable number.

561626929 is a deficient number, since it is larger than the sum of its proper divisors (2661951).

561626929 is a wasteful number, since it uses less digits than its factorization.

561626929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661950.

The product of its digits is 349920, while the sum is 46.

The square root of 561626929 is about 23698.6693508306. The cubic root of 561626929 is about 825.0545070813.

The spelling of 561626929 in words is "five hundred sixty-one million, six hundred twenty-six thousand, nine hundred twenty-nine".