42399983 has 2 divisors, whose sum is σ = 42399984. Its totient is φ = 42399982.

The previous prime is 42399979. The next prime is 42400009. The reversal of 42399983 is 38999324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42399983 - 2² = 42399979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42399913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21199991 + 21199992.

It is an arithmetic number, because the mean of its divisors is an integer number (21199992).

Almost surely, 2^42399983 is an apocalyptic number.

42399983 is a deficient number, since it is larger than the sum of its proper divisors (1).

42399983 is an equidigital number, since it uses as much as digits as its factorization.

42399983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 42399983 is about 6511.5269330626. The cubic root of 42399983 is about 348.7026336497.

The spelling of 42399983 in words is "forty-two million, three hundred ninety-nine thousand, nine hundred eighty-three".