42491927 has 2 divisors, whose sum is σ = 42491928. Its totient is φ = 42491926.

The previous prime is 42491921. The next prime is 42492019. The reversal of 42491927 is 72919424.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42491927 is a prime.

It is equal to p_2575739 and since 42491927 and 2575739 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42491921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21245963 + 21245964.

It is an arithmetic number, because the mean of its divisors is an integer number (21245964).

Almost surely, 2^42491927 is an apocalyptic number.

42491927 is a deficient number, since it is larger than the sum of its proper divisors (1).

42491927 is an equidigital number, since it uses as much as digits as its factorization.

42491927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 42491927 is about 6518.5832049610. The cubic root of 42491927 is about 348.9545045689.

The spelling of 42491927 in words is "forty-two million, four hundred ninety-one thousand, nine hundred twenty-seven".