42887797 has 4 divisors (see below), whose sum is σ = 42919360. Its totient is φ = 42856236.

The previous prime is 42887783. The next prime is 42887809. The reversal of 42887797 is 79778824.

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 42887797 - 2²³ = 34499189 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 (42887717) 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, 13647 + ... + 16492.

It is an arithmetic number, because the mean of its divisors is an integer number (10729840).

Almost surely, 2^42887797 is an apocalyptic number.

It is an amenable number.

42887797 is a deficient number, since it is larger than the sum of its proper divisors (31563).

42887797 is a wasteful number, since it uses less digits than its factorization.

42887797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31562.

The product of its digits is 1580544, while the sum is 52.

The square root of 42887797 is about 6548.8775374105. The cubic root of 42887797 is about 350.0348183048.

The spelling of 42887797 in words is "forty-two million, eight hundred eighty-seven thousand, seven hundred ninety-seven".