561240993 has 4 divisors (see below), whose sum is σ = 748321328. Its totient is φ = 374160660.

The previous prime is 561240991. The next prime is 561241003. The reversal of 561240993 is 399042165.

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 not a de Polignac number, because 561240993 - 2¹ = 561240991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561240991) 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, 93540163 + ... + 93540168.

It is an arithmetic number, because the mean of its divisors is an integer number (187080332).

Almost surely, 2^561240993 is an apocalyptic number.

It is an amenable number.

561240993 is a deficient number, since it is larger than the sum of its proper divisors (187080335).

561240993 is a wasteful number, since it uses less digits than its factorization.

561240993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187080334.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 561240993 is about 23690.5253846343. The cubic root of 561240993 is about 824.8654781583.

The spelling of 561240993 in words is "five hundred sixty-one million, two hundred forty thousand, nine hundred ninety-three".