42670997 has 4 divisors (see below), whose sum is σ = 42755340. Its totient is φ = 42586656.

The previous prime is 42670967. The next prime is 42671009. The reversal of 42670997 is 79907624.

42670997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28238596 + 14432401 = 5314^2 + 3799^2 .

It is a cyclic number.

It is not a de Polignac number, because 42670997 - 2⁶ = 42670933 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 (42670907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41408 + ... + 42425.

It is an arithmetic number, because the mean of its divisors is an integer number (10688835).

Almost surely, 2^42670997 is an apocalyptic number.

It is an amenable number.

42670997 is a deficient number, since it is larger than the sum of its proper divisors (84343).

42670997 is an equidigital number, since it uses as much as digits as its factorization.

42670997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84342.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 42670997 is about 6532.3041111081. The cubic root of 42670997 is about 349.4440070403. Note that the first 3 decimals are identical.

The spelling of 42670997 in words is "forty-two million, six hundred seventy thousand, nine hundred ninety-seven".