42989973 has 8 divisors (see below), whose sum is σ = 61729248. Its totient is φ = 26455344.

The previous prime is 42989971. The next prime is 42989987. The reversal of 42989973 is 37998924.

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

It is not a de Polignac number, because 42989973 - 2¹ = 42989971 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42989971) 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, 551115 + ... + 551192.

It is an arithmetic number, because the mean of its divisors is an integer number (7716156).

Almost surely, 2^42989973 is an apocalyptic number.

It is an amenable number.

42989973 is a deficient number, since it is larger than the sum of its proper divisors (18739275).

42989973 is a wasteful number, since it uses less digits than its factorization.

42989973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102323.

The product of its digits is 979776, while the sum is 51.

The square root of 42989973 is about 6556.6739281438. The cubic root of 42989973 is about 350.3125724703.

The spelling of 42989973 in words is "forty-two million, nine hundred eighty-nine thousand, nine hundred seventy-three".