42757623 has 6 divisors (see below), whose sum is σ = 61761024. Its totient is φ = 28505076.

The previous prime is 42757579. The next prime is 42757679. The reversal of 42757623 is 32675724.

It is a happy number.

42757623 is a `hidden beast` number, since 4 + 27 + 5 + 7 + 623 = 666.

It is not a de Polignac number, because 42757623 - 2⁹ = 42757111 is a prime.

It is a super-2 number, since 2×42757623² = 3656428649220258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42757823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2375415 + ... + 2375432.

It is an arithmetic number, because the mean of its divisors is an integer number (10293504).

Almost surely, 2^42757623 is an apocalyptic number.

42757623 is a deficient number, since it is larger than the sum of its proper divisors (19003401).

42757623 is a wasteful number, since it uses less digits than its factorization.

42757623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750853 (or 4750850 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 42757623 is about 6538.9313347060. The cubic root of 42757623 is about 349.6803148957.

The spelling of 42757623 in words is "forty-two million, seven hundred fifty-seven thousand, six hundred twenty-three".