42049999973 has 2 divisors, whose sum is σ = 42049999974. Its totient is φ = 42049999972.

The previous prime is 42049999961. The next prime is 42050000023. The reversal of 42049999973 is 37999994024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42048783364 + 1216609 = 205058^2 + 1103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42049999973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42049996973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21024999986 + 21024999987.

It is an arithmetic number, because the mean of its divisors is an integer number (21024999987).

Almost surely, 2^42049999973 is an apocalyptic number.

It is an amenable number.

42049999973 is a deficient number, since it is larger than the sum of its proper divisors (1).

42049999973 is an equidigital number, since it uses as much as digits as its factorization.

42049999973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39680928, while the sum is 65.

The spelling of 42049999973 in words is "forty-two billion, forty-nine million, nine hundred ninety-nine thousand, nine hundred seventy-three".