42993667 has 4 divisors (see below), whose sum is σ = 44155696. Its totient is φ = 41831640.

The previous prime is 42993661. The next prime is 42993701. The reversal of 42993667 is 76639924.

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 42993667 - 2¹⁹ = 42469379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42993661) 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, 580959 + ... + 581032.

It is an arithmetic number, because the mean of its divisors is an integer number (11038924).

Almost surely, 2^42993667 is an apocalyptic number.

42993667 is a deficient number, since it is larger than the sum of its proper divisors (1162029).

42993667 is a wasteful number, since it uses less digits than its factorization.

42993667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162028.

The product of its digits is 489888, while the sum is 46.

The square root of 42993667 is about 6556.9556197980. The cubic root of 42993667 is about 350.3226059540.

It can be divided in two parts, 42993 and 667, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 42993667 in words is "forty-two million, nine hundred ninety-three thousand, six hundred sixty-seven".