42678997 has 8 divisors (see below), whose sum is σ = 45057600. Its totient is φ = 40313664.

The previous prime is 42678953. The next prime is 42679001. The reversal of 42678997 is 79987624.

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 42678997 - 2¹⁵ = 42646229 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 (42678907) 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, 3693 + ... + 9949.

It is an arithmetic number, because the mean of its divisors is an integer number (5632200).

Almost surely, 2^42678997 is an apocalyptic number.

It is an amenable number.

42678997 is a deficient number, since it is larger than the sum of its proper divisors (2378603).

42678997 is a wasteful number, since it uses less digits than its factorization.

42678997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6635.

The product of its digits is 1524096, while the sum is 52.

The square root of 42678997 is about 6532.9164237728. The cubic root of 42678997 is about 349.4658437097.

The spelling of 42678997 in words is "forty-two million, six hundred seventy-eight thousand, nine hundred ninety-seven".