42387179 has 2 divisors, whose sum is σ = 42387180. Its totient is φ = 42387178.

The previous prime is 42387173. The next prime is 42387197. The reversal of 42387179 is 97178324.

Together with next prime (42387197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42387179 - 2⁸ = 42386923 is a prime.

It is a Chen prime.

It is equal to p_2569784 and since 42387179 and 2569784 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42387173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21193589 + 21193590.

It is an arithmetic number, because the mean of its divisors is an integer number (21193590).

Almost surely, 2^42387179 is an apocalyptic number.

42387179 is a deficient number, since it is larger than the sum of its proper divisors (1).

42387179 is an equidigital number, since it uses as much as digits as its factorization.

42387179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 42387179 is about 6510.5436792944. The cubic root of 42387179 is about 348.6675295631.

The spelling of 42387179 in words is "forty-two million, three hundred eighty-seven thousand, one hundred seventy-nine".