42137969 has 2 divisors, whose sum is σ = 42137970. Its totient is φ = 42137968.

The previous prime is 42137939. The next prime is 42137981. The reversal of 42137969 is 96973124.

42137969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35046400 + 7091569 = 5920^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 42137969 - 2²⁰ = 41089393 is a prime.

It is a super-2 number, since 2×42137969² = 3551216862889922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42137929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21068984 + 21068985.

It is an arithmetic number, because the mean of its divisors is an integer number (21068985).

Almost surely, 2^42137969 is an apocalyptic number.

It is an amenable number.

42137969 is a deficient number, since it is larger than the sum of its proper divisors (1).

42137969 is an equidigital number, since it uses as much as digits as its factorization.

42137969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 42137969 is about 6491.3765104175. The cubic root of 42137969 is about 347.9828706282.

The spelling of 42137969 in words is "forty-two million, one hundred thirty-seven thousand, nine hundred sixty-nine".