42788873 has 2 divisors, whose sum is σ = 42788874. Its totient is φ = 42788872.

The previous prime is 42788857. The next prime is 42788899. The reversal of 42788873 is 37888724.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36820624 + 5968249 = 6068^2 + 2443^2 .

It is a cyclic number.

It is not a de Polignac number, because 42788873 - 2⁴ = 42788857 is a prime.

It is a super-2 number, since 2×42788873² = 3661775305220258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42788803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21394436 + 21394437.

It is an arithmetic number, because the mean of its divisors is an integer number (21394437).

Almost surely, 2^42788873 is an apocalyptic number.

It is an amenable number.

42788873 is a deficient number, since it is larger than the sum of its proper divisors (1).

42788873 is an equidigital number, since it uses as much as digits as its factorization.

42788873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602112, while the sum is 47.

The square root of 42788873 is about 6541.3204324509. The cubic root of 42788873 is about 349.7654837146.

The spelling of 42788873 in words is "forty-two million, seven hundred eighty-eight thousand, eight hundred seventy-three".