42023777 has 4 divisors (see below), whose sum is σ = 42439956. Its totient is φ = 41607600.

The previous prime is 42023767. The next prime is 42023789. The reversal of 42023777 is 77732024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34093921 + 7929856 = 5839^2 + 2816^2 .

It is a cyclic number.

It is not a de Polignac number, because 42023777 - 2⁸ = 42023521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42023767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207938 + ... + 208139.

It is an arithmetic number, because the mean of its divisors is an integer number (10609989).

Almost surely, 2^42023777 is an apocalyptic number.

It is an amenable number.

42023777 is a deficient number, since it is larger than the sum of its proper divisors (416179).

42023777 is a wasteful number, since it uses less digits than its factorization.

42023777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416178.

The product of its (nonzero) digits is 16464, while the sum is 32.

The square root of 42023777 is about 6482.5748742301. The cubic root of 42023777 is about 347.6682469442.

The spelling of 42023777 in words is "forty-two million, twenty-three thousand, seven hundred seventy-seven".