42719687 has 2 divisors, whose sum is σ = 42719688. Its totient is φ = 42719686.

The previous prime is 42719629. The next prime is 42719689. The reversal of 42719687 is 78691724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42719687 - 2¹⁸ = 42457543 is a prime.

Together with 42719689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42719689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21359843 + 21359844.

It is an arithmetic number, because the mean of its divisors is an integer number (21359844).

Almost surely, 2^42719687 is an apocalyptic number.

42719687 is a deficient number, since it is larger than the sum of its proper divisors (1).

42719687 is an equidigital number, since it uses as much as digits as its factorization.

42719687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 42719687 is about 6536.0299111923. The cubic root of 42719687 is about 349.5768682538.

The spelling of 42719687 in words is "forty-two million, seven hundred nineteen thousand, six hundred eighty-seven".