561940907 has 4 divisors (see below), whose sum is σ = 613026456. Its totient is φ = 510855360.

The previous prime is 561940879. The next prime is 561940969. The reversal of 561940907 is 709049165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561940907 - 2⁶ = 561940843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561940987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25542758 + ... + 25542779.

It is an arithmetic number, because the mean of its divisors is an integer number (153256614).

Almost surely, 2^561940907 is an apocalyptic number.

561940907 is a deficient number, since it is larger than the sum of its proper divisors (51085549).

561940907 is a wasteful number, since it uses less digits than its factorization.

561940907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51085548.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 561940907 is about 23705.2928056162. The cubic root of 561940907 is about 825.2082275742.

The spelling of 561940907 in words is "five hundred sixty-one million, nine hundred forty thousand, nine hundred seven".