42637807 has 2 divisors, whose sum is σ = 42637808. Its totient is φ = 42637806.

The previous prime is 42637781. The next prime is 42637817. The reversal of 42637807 is 70873624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42637807 - 2¹¹ = 42635759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42637817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21318903 + 21318904.

It is an arithmetic number, because the mean of its divisors is an integer number (21318904).

Almost surely, 2^42637807 is an apocalyptic number.

42637807 is a deficient number, since it is larger than the sum of its proper divisors (1).

42637807 is an equidigital number, since it uses as much as digits as its factorization.

42637807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 42637807 is about 6529.7631656899. The cubic root of 42637807 is about 349.3533829963.

The spelling of 42637807 in words is "forty-two million, six hundred thirty-seven thousand, eight hundred seven".