561139933 has 2 divisors, whose sum is σ = 561139934. Its totient is φ = 561139932.

The previous prime is 561139903. The next prime is 561139951. The reversal of 561139933 is 339931165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488498404 + 72641529 = 22102^2 + 8523^2 .

It is a cyclic number.

It is not a de Polignac number, because 561139933 - 2⁹ = 561139421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561139903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280569966 + 280569967.

It is an arithmetic number, because the mean of its divisors is an integer number (280569967).

Almost surely, 2^561139933 is an apocalyptic number.

It is an amenable number.

561139933 is a deficient number, since it is larger than the sum of its proper divisors (1).

561139933 is an equidigital number, since it uses as much as digits as its factorization.

561139933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65610, while the sum is 40.

The square root of 561139933 is about 23688.3923684154. The cubic root of 561139933 is about 824.8159653167.

The spelling of 561139933 in words is "five hundred sixty-one million, one hundred thirty-nine thousand, nine hundred thirty-three".