42618613 has 4 divisors (see below), whose sum is σ = 43525440. Its totient is φ = 41711788.

The previous prime is 42618601. The next prime is 42618637. The reversal of 42618613 is 31681624.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42618613 - 2⁹ = 42618101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42618013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453343 + ... + 453436.

It is an arithmetic number, because the mean of its divisors is an integer number (10881360).

Almost surely, 2^42618613 is an apocalyptic number.

It is an amenable number.

42618613 is a deficient number, since it is larger than the sum of its proper divisors (906827).

42618613 is an equidigital number, since it uses as much as digits as its factorization.

42618613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906826.

The product of its digits is 6912, while the sum is 31.

The square root of 42618613 is about 6528.2932685350. The cubic root of 42618613 is about 349.3009530384.

The spelling of 42618613 in words is "forty-two million, six hundred eighteen thousand, six hundred thirteen".