42001999937 has 2 divisors, whose sum is σ = 42001999938. Its totient is φ = 42001999936.

The previous prime is 42001999891. The next prime is 42002000009. The reversal of 42001999937 is 73999910024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38117095696 + 3884904241 = 195236^2 + 62329^2 .

It is a cyclic number.

It is not a de Polignac number, because 42001999937 - 2⁸ = 42001999681 is a prime.

It is not a weakly prime, because it can be changed into another prime (42001939937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000999968 + 21000999969.

It is an arithmetic number, because the mean of its divisors is an integer number (21000999969).

Almost surely, 2^42001999937 is an apocalyptic number.

It is an amenable number.

42001999937 is a deficient number, since it is larger than the sum of its proper divisors (1).

42001999937 is an equidigital number, since it uses as much as digits as its factorization.

42001999937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 42001999937 in words is "forty-two billion, one million, nine hundred ninety-nine thousand, nine hundred thirty-seven".