42919797 has 16 divisors (see below), whose sum is σ = 59379840. Its totient is φ = 27542592.

The previous prime is 42919753. The next prime is 42919813. The reversal of 42919797 is 79791924.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-42919797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42919697) 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, 41863 + ... + 42875.

It is an arithmetic number, because the mean of its divisors is an integer number (3711240).

Almost surely, 2^42919797 is an apocalyptic number.

It is an amenable number.

42919797 is a deficient number, since it is larger than the sum of its proper divisors (16460043).

42919797 is a wasteful number, since it uses less digits than its factorization.

42919797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its digits is 285768, while the sum is 48.

The square root of 42919797 is about 6551.3202486216. The cubic root of 42919797 is about 350.1218541696.

The spelling of 42919797 in words is "forty-two million, nine hundred nineteen thousand, seven hundred ninety-seven".