42937913 has 2 divisors, whose sum is σ = 42937914. Its totient is φ = 42937912.

The previous prime is 42937901. The next prime is 42937963. The reversal of 42937913 is 31973924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33028009 + 9909904 = 5747^2 + 3148^2 .

It is a cyclic number.

It is not a de Polignac number, because 42937913 - 2¹⁶ = 42872377 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42937963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21468956 + 21468957.

It is an arithmetic number, because the mean of its divisors is an integer number (21468957).

Almost surely, 2^42937913 is an apocalyptic number.

It is an amenable number.

42937913 is a deficient number, since it is larger than the sum of its proper divisors (1).

42937913 is an equidigital number, since it uses as much as digits as its factorization.

42937913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 38.

The square root of 42937913 is about 6552.7027248304. The cubic root of 42937913 is about 350.1711081717.

The spelling of 42937913 in words is "forty-two million, nine hundred thirty-seven thousand, nine hundred thirteen".