42749687 has 8 divisors (see below), whose sum is σ = 43221216. Its totient is φ = 42280992.

The previous prime is 42749671. The next prime is 42749701. The reversal of 42749687 is 78694724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42749687 - 2⁴ = 42749671 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 (42749587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42998 + ... + 43980.

It is an arithmetic number, because the mean of its divisors is an integer number (5402652).

Almost surely, 2^42749687 is an apocalyptic number.

42749687 is a deficient number, since it is larger than the sum of its proper divisors (471529).

42749687 is a wasteful number, since it uses less digits than its factorization.

42749687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417.

The product of its digits is 677376, while the sum is 47.

The square root of 42749687 is about 6538.3244795590. The cubic root of 42749687 is about 349.6586794969.

The spelling of 42749687 in words is "forty-two million, seven hundred forty-nine thousand, six hundred eighty-seven".