42800779 has 4 divisors (see below), whose sum is σ = 48915184. Its totient is φ = 36686376.

The previous prime is 42800777. The next prime is 42800789. The reversal of 42800779 is 97700824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42800779 - 2¹ = 42800777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42800777) 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, 3057192 + ... + 3057205.

It is an arithmetic number, because the mean of its divisors is an integer number (12228796).

Almost surely, 2^42800779 is an apocalyptic number.

42800779 is a deficient number, since it is larger than the sum of its proper divisors (6114405).

42800779 is an equidigital number, since it uses as much as digits as its factorization.

42800779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6114404.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 42800779 is about 6542.2304300598. The cubic root of 42800779 is about 349.7979214441.

The spelling of 42800779 in words is "forty-two million, eight hundred thousand, seven hundred seventy-nine".