42566899 has 2 divisors, whose sum is σ = 42566900. Its totient is φ = 42566898.

The previous prime is 42566873. The next prime is 42566921. The reversal of 42566899 is 99866524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42566899 - 2¹³ = 42558707 is a prime.

It is not a weakly prime, because it can be changed into another prime (42566869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21283449 + 21283450.

It is an arithmetic number, because the mean of its divisors is an integer number (21283450).

Almost surely, 2^42566899 is an apocalyptic number.

42566899 is a deficient number, since it is larger than the sum of its proper divisors (1).

42566899 is an equidigital number, since it uses as much as digits as its factorization.

42566899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 42566899 is about 6524.3313067317. The cubic root of 42566899 is about 349.1596136923.

The spelling of 42566899 in words is "forty-two million, five hundred sixty-six thousand, eight hundred ninety-nine".