42791519 has 2 divisors, whose sum is σ = 42791520. Its totient is φ = 42791518.

The previous prime is 42791509. The next prime is 42791521. The reversal of 42791519 is 91519724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42791519 is a prime.

It is a super-2 number, since 2×42791519² = 3662228196654722, which contains 22 as substring.

Together with 42791521, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2592749 and since 42791519 and 2592749 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 (42791509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21395759 + 21395760.

It is an arithmetic number, because the mean of its divisors is an integer number (21395760).

Almost surely, 2^42791519 is an apocalyptic number.

42791519 is a deficient number, since it is larger than the sum of its proper divisors (1).

42791519 is an equidigital number, since it uses as much as digits as its factorization.

42791519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 42791519 is about 6541.5226820672. The cubic root of 42791519 is about 349.7726932244.

The spelling of 42791519 in words is "forty-two million, seven hundred ninety-one thousand, five hundred nineteen".