42397719 has 16 divisors (see below), whose sum is σ = 69576192. Its totient is φ = 22363488.

The previous prime is 42397669. The next prime is 42397769. The reversal of 42397719 is 91779324.

It is an interprime number because it is at equal distance from previous prime (42397669) and next prime (42397769).

It is not a de Polignac number, because 42397719 - 2⁷ = 42397591 is a prime.

It is a super-2 number, since 2×42397719² = 3595133152805922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42397769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77379 + ... + 77924.

It is an arithmetic number, because the mean of its divisors is an integer number (4348512).

Almost surely, 2^42397719 is an apocalyptic number.

42397719 is a deficient number, since it is larger than the sum of its proper divisors (27178473).

42397719 is a wasteful number, since it uses less digits than its factorization.

42397719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155326.

The product of its digits is 95256, while the sum is 42.

The square root of 42397719 is about 6511.3530851890. The cubic root of 42397719 is about 348.6964270685.

The spelling of 42397719 in words is "forty-two million, three hundred ninety-seven thousand, seven hundred nineteen".