42389537 has 2 divisors, whose sum is σ = 42389538. Its totient is φ = 42389536.

The previous prime is 42389533. The next prime is 42389591. The reversal of 42389537 is 73598324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33651601 + 8737936 = 5801^2 + 2956^2 .

It is a cyclic number.

It is not a de Polignac number, because 42389537 - 2² = 42389533 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42389494 and 42389503.

It is not a weakly prime, because it can be changed into another prime (42389533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21194768 + 21194769.

It is an arithmetic number, because the mean of its divisors is an integer number (21194769).

Almost surely, 2^42389537 is an apocalyptic number.

It is an amenable number.

42389537 is a deficient number, since it is larger than the sum of its proper divisors (1).

42389537 is an equidigital number, since it uses as much as digits as its factorization.

42389537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 42389537 is about 6510.7247676430. The cubic root of 42389537 is about 348.6739949048.

The spelling of 42389537 in words is "forty-two million, three hundred eighty-nine thousand, five hundred thirty-seven".