42391759 has 2 divisors, whose sum is σ = 42391760. Its totient is φ = 42391758.

The previous prime is 42391733. The next prime is 42391861. The reversal of 42391759 is 95719324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42391759 - 2²⁵ = 8837327 is a prime.

It is a super-2 number, since 2×42391759² = 3594122462228162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42391259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21195879 + 21195880.

It is an arithmetic number, because the mean of its divisors is an integer number (21195880).

Almost surely, 2^42391759 is an apocalyptic number.

42391759 is a deficient number, since it is larger than the sum of its proper divisors (1).

42391759 is an equidigital number, since it uses as much as digits as its factorization.

42391759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 42391759 is about 6510.8954069314. The cubic root of 42391759 is about 348.6800871321.

The spelling of 42391759 in words is "forty-two million, three hundred ninety-one thousand, seven hundred fifty-nine".