42400100999 has 2 divisors, whose sum is σ = 42400101000. Its totient is φ = 42400100998.

The previous prime is 42400100993. The next prime is 42400101061. The reversal of 42400100999 is 99900100424.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42400100999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42400100993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200050499 + 21200050500.

It is an arithmetic number, because the mean of its divisors is an integer number (21200050500).

Almost surely, 2^42400100999 is an apocalyptic number.

42400100999 is a deficient number, since it is larger than the sum of its proper divisors (1).

42400100999 is an equidigital number, since it uses as much as digits as its factorization.

42400100999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 42400100999 in words is "forty-two billion, four hundred million, one hundred thousand, nine hundred ninety-nine".