561038407 has 2 divisors, whose sum is σ = 561038408. Its totient is φ = 561038406.

The previous prime is 561038393. The next prime is 561038419. The reversal of 561038407 is 704830165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561038407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561038477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280519203 + 280519204.

It is an arithmetic number, because the mean of its divisors is an integer number (280519204).

Almost surely, 2^561038407 is an apocalyptic number.

561038407 is a deficient number, since it is larger than the sum of its proper divisors (1).

561038407 is an equidigital number, since it uses as much as digits as its factorization.

561038407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 561038407 is about 23686.2493231833. The cubic root of 561038407 is about 824.7662181790.

The spelling of 561038407 in words is "five hundred sixty-one million, thirty-eight thousand, four hundred seven".