42972623 has 4 divisors (see below), whose sum is σ = 45234360. Its totient is φ = 40710888.

The previous prime is 42972613. The next prime is 42972667. The reversal of 42972623 is 32627924.

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 42972623 - 2²² = 38778319 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 (42972613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130840 + ... + 1130877.

It is an arithmetic number, because the mean of its divisors is an integer number (11308590).

Almost surely, 2^42972623 is an apocalyptic number.

42972623 is a deficient number, since it is larger than the sum of its proper divisors (2261737).

42972623 is a wasteful number, since it uses less digits than its factorization.

42972623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261736.

The product of its digits is 36288, while the sum is 35.

The square root of 42972623 is about 6555.3507152554. The cubic root of 42972623 is about 350.2654394566.

The spelling of 42972623 in words is "forty-two million, nine hundred seventy-two thousand, six hundred twenty-three".