42037969 has 2 divisors, whose sum is σ = 42037970. Its totient is φ = 42037968.

The previous prime is 42037901. The next prime is 42037979. The reversal of 42037969 is 96973024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25877569 + 16160400 = 5087^2 + 4020^2 .

It is a cyclic number.

It is not a de Polignac number, because 42037969 - 2¹¹ = 42035921 is a prime.

It is a super-2 number, since 2×42037969² = 3534381675289922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42037979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21018984 + 21018985.

It is an arithmetic number, because the mean of its divisors is an integer number (21018985).

Almost surely, 2^42037969 is an apocalyptic number.

It is an amenable number.

42037969 is a deficient number, since it is larger than the sum of its proper divisors (1).

42037969 is an equidigital number, since it uses as much as digits as its factorization.

42037969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 42037969 is about 6483.6694085988. The cubic root of 42037969 is about 347.7073799682.

The spelling of 42037969 in words is "forty-two million, thirty-seven thousand, nine hundred sixty-nine".