42901913 has 2 divisors, whose sum is σ = 42901914. Its totient is φ = 42901912.

The previous prime is 42901891. The next prime is 42901921. The reversal of 42901913 is 31910924.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29300569 + 13601344 = 5413^2 + 3688^2 .

It is a cyclic number.

It is not a de Polignac number, because 42901913 - 2⁸ = 42901657 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 (42901973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21450956 + 21450957.

It is an arithmetic number, because the mean of its divisors is an integer number (21450957).

Almost surely, 2^42901913 is an apocalyptic number.

It is an amenable number.

42901913 is a deficient number, since it is larger than the sum of its proper divisors (1).

42901913 is an equidigital number, since it uses as much as digits as its factorization.

42901913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 42901913 is about 6549.9551906864. The cubic root of 42901913 is about 350.0732173355.

The spelling of 42901913 in words is "forty-two million, nine hundred one thousand, nine hundred thirteen".