42489797 has 4 divisors (see below), whose sum is σ = 48559776. Its totient is φ = 36419820.

The previous prime is 42489787. The next prime is 42489829. The reversal of 42489797 is 79798424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42489797 - 2⁴ = 42489781 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 (42489787) 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, 3034979 + ... + 3034992.

It is an arithmetic number, because the mean of its divisors is an integer number (12139944).

Almost surely, 2^42489797 is an apocalyptic number.

It is an amenable number.

42489797 is a deficient number, since it is larger than the sum of its proper divisors (6069979).

42489797 is an equidigital number, since it uses as much as digits as its factorization.

42489797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6069978.

The product of its digits is 1016064, while the sum is 50.

The square root of 42489797 is about 6518.4198238530. The cubic root of 42489797 is about 348.9486737710.

The spelling of 42489797 in words is "forty-two million, four hundred eighty-nine thousand, seven hundred ninety-seven".