32981389 has 4 divisors (see below), whose sum is σ = 37693024. Its totient is φ = 28269756.

The previous prime is 32981371. The next prime is 32981401. The reversal of 32981389 is 98318923.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98318923 = 89 ⋅1104707.

It is a cyclic number.

It is not a de Polignac number, because 32981389 - 2⁹ = 32980877 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 (32981369) 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, 2355807 + ... + 2355820.

It is an arithmetic number, because the mean of its divisors is an integer number (9423256).

Almost surely, 2^32981389 is an apocalyptic number.

It is an amenable number.

32981389 is a deficient number, since it is larger than the sum of its proper divisors (4711635).

32981389 is an equidigital number, since it uses as much as digits as its factorization.

32981389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711634.

The product of its digits is 93312, while the sum is 43.

The square root of 32981389 is about 5742.9425384554. The cubic root of 32981389 is about 320.6931232551.

It can be divided in two parts, 329 and 81389, that added together give a palindrome (81718).

The spelling of 32981389 in words is "thirty-two million, nine hundred eighty-one thousand, three hundred eighty-nine".