42988723 has 4 divisors (see below), whose sum is σ = 44375488. Its totient is φ = 41601960.

The previous prime is 42988717. The next prime is 42988747. The reversal of 42988723 is 32788924.

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 42988723 - 2¹⁷ = 42857651 is a prime.

It is a super-3 number, since 3×42988723³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42988723.

It is not an unprimeable number, because it can be changed into a prime (42988793) 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, 693336 + ... + 693397.

It is an arithmetic number, because the mean of its divisors is an integer number (11093872).

Almost surely, 2^42988723 is an apocalyptic number.

42988723 is a deficient number, since it is larger than the sum of its proper divisors (1386765).

42988723 is a wasteful number, since it uses less digits than its factorization.

42988723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386764.

The product of its digits is 193536, while the sum is 43.

The square root of 42988723 is about 6556.5786047298. The cubic root of 42988723 is about 350.3091771440.

The spelling of 42988723 in words is "forty-two million, nine hundred eighty-eight thousand, seven hundred twenty-three".