42775789 has 4 divisors (see below), whose sum is σ = 48886624. Its totient is φ = 36664956.

The previous prime is 42775763. The next prime is 42775801. The reversal of 42775789 is 98757724.

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 42775789 - 2⁷ = 42775661 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 (42775709) 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, 3055407 + ... + 3055420.

It is an arithmetic number, because the mean of its divisors is an integer number (12221656).

Almost surely, 2^42775789 is an apocalyptic number.

It is an amenable number.

42775789 is a deficient number, since it is larger than the sum of its proper divisors (6110835).

42775789 is an equidigital number, since it uses as much as digits as its factorization.

42775789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6110834.

The product of its digits is 987840, while the sum is 49.

The square root of 42775789 is about 6540.3202520978. The cubic root of 42775789 is about 349.7298296002.

The spelling of 42775789 in words is "forty-two million, seven hundred seventy-five thousand, seven hundred eighty-nine".