42317399 has 2 divisors, whose sum is σ = 42317400.
Its totient is φ = 42317398.
The previous prime is 42317383. The next prime is 42317411. The reversal of 42317399 is 99371324.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 42317399 - 24 = 42317383 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (42317339) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21158699 + 21158700.
It is an arithmetic number, because the mean of its divisors is an integer number (21158700).
Almost surely, 242317399 is an apocalyptic number.
42317399 is a deficient number, since it is larger than the sum of its proper divisors (1).
42317399 is an equidigital number, since it uses as much as digits as its factorization.
42317399 is an evil number, because the sum of its binary digits is even.
The product of its digits is 40824, while the sum is 38.
The square root of 42317399 is about 6505.1824724599.
The cubic root of 42317399 is about 348.4760928745.
The spelling of 42317399 in words is "forty-two million, three hundred seventeen thousand, three hundred ninety-nine".