42907913 has 2 divisors, whose sum is σ = 42907914. Its totient is φ = 42907912.

The previous prime is 42907883. The next prime is 42907961. The reversal of 42907913 is 31970924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23309584 + 19598329 = 4828^2 + 4427^2 .

It is a cyclic number.

It is not a de Polignac number, because 42907913 - 2¹⁶ = 42842377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42907973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21453956 + 21453957.

It is an arithmetic number, because the mean of its divisors is an integer number (21453957).

Almost surely, 2^42907913 is an apocalyptic number.

It is an amenable number.

42907913 is a deficient number, since it is larger than the sum of its proper divisors (1).

42907913 is an equidigital number, since it uses as much as digits as its factorization.

42907913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 42907913 is about 6550.4131930742. The cubic root of 42907913 is about 350.0895362767.

The spelling of 42907913 in words is "forty-two million, nine hundred seven thousand, nine hundred thirteen".