42763391 has 4 divisors (see below), whose sum is σ = 46650984. Its totient is φ = 38875800.

The previous prime is 42763363. The next prime is 42763393. The reversal of 42763391 is 19336724.

42763391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42763391 - 2¹⁰ = 42762367 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 (42763393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943780 + ... + 1943801.

It is an arithmetic number, because the mean of its divisors is an integer number (11662746).

Almost surely, 2^42763391 is an apocalyptic number.

42763391 is a deficient number, since it is larger than the sum of its proper divisors (3887593).

42763391 is a wasteful number, since it uses less digits than its factorization.

42763391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887592.

The product of its digits is 27216, while the sum is 35.

The square root of 42763391 is about 6539.3723704955. The cubic root of 42763391 is about 349.6960381378.

It can be divided in two parts, 427633 and 91, that added together give a palindrome (427724).

The spelling of 42763391 in words is "forty-two million, seven hundred sixty-three thousand, three hundred ninety-one".