561417379 has 2 divisors, whose sum is σ = 561417380. Its totient is φ = 561417378.

The previous prime is 561417361. The next prime is 561417443. The reversal of 561417379 is 973714165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561417379 - 2¹¹ = 561415331 is a prime.

It is not a weakly prime, because it can be changed into another prime (561417319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280708689 + 280708690.

It is an arithmetic number, because the mean of its divisors is an integer number (280708690).

Almost surely, 2^561417379 is an apocalyptic number.

561417379 is a deficient number, since it is larger than the sum of its proper divisors (1).

561417379 is an equidigital number, since it uses as much as digits as its factorization.

561417379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 561417379 is about 23694.2478040557. The cubic root of 561417379 is about 824.9518816135.

The spelling of 561417379 in words is "five hundred sixty-one million, four hundred seventeen thousand, three hundred seventy-nine".