42112087949 has 2 divisors, whose sum is σ = 42112087950. Its totient is φ = 42112087948.

The previous prime is 42112087907. The next prime is 42112087951. The reversal of 42112087949 is 94978021124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37339765225 + 4772322724 = 193235^2 + 69082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42112087949 is a prime.

It is a super-2 number, since 2×42112087949² (a number of 22 digits) contains 22 as substring.

Together with 42112087951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42112080949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21056043974 + 21056043975.

It is an arithmetic number, because the mean of its divisors is an integer number (21056043975).

Almost surely, 2^42112087949 is an apocalyptic number.

It is an amenable number.

42112087949 is a deficient number, since it is larger than the sum of its proper divisors (1).

42112087949 is an equidigital number, since it uses as much as digits as its factorization.

42112087949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 42112087949 in words is "forty-two billion, one hundred twelve million, eighty-seven thousand, nine hundred forty-nine".