89970439 has 4 divisors (see below), whose sum is σ = 96891256. Its totient is φ = 83049624.

The previous prime is 89970427. The next prime is 89970449. The reversal of 89970439 is 93407998.

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 89970439 - 2⁷ = 89970311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89970392 and 89970401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89970449) 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, 3460389 + ... + 3460414.

It is an arithmetic number, because the mean of its divisors is an integer number (24222814).

Almost surely, 2^89970439 is an apocalyptic number.

89970439 is a deficient number, since it is larger than the sum of its proper divisors (6920817).

89970439 is a wasteful number, since it uses less digits than its factorization.

89970439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6920816.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 89970439 is about 9485.2748510520. The cubic root of 89970439 is about 448.0914045400.

It can be divided in two parts, 89970 and 439, that added together give a palindrome (90409).

The spelling of 89970439 in words is "eighty-nine million, nine hundred seventy thousand, four hundred thirty-nine".