561829057 has 2 divisors, whose sum is σ = 561829058. Its totient is φ = 561829056.

The previous prime is 561829049. The next prime is 561829087. The reversal of 561829057 is 750928165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551357361 + 10471696 = 23481^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 561829057 - 2³ = 561829049 is a prime.

It is not a weakly prime, because it can be changed into another prime (561829087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280914528 + 280914529.

It is an arithmetic number, because the mean of its divisors is an integer number (280914529).

Almost surely, 2^561829057 is an apocalyptic number.

It is an amenable number.

561829057 is a deficient number, since it is larger than the sum of its proper divisors (1).

561829057 is an equidigital number, since it uses as much as digits as its factorization.

561829057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 561829057 is about 23702.9335104328. The cubic root of 561829057 is about 825.1534734986.

The spelling of 561829057 in words is "five hundred sixty-one million, eight hundred twenty-nine thousand, fifty-seven".