32689945 has 4 divisors (see below), whose sum is σ = 39227940. Its totient is φ = 26151952.

The previous prime is 32689939. The next prime is 32689949. The reversal of 32689945 is 54998623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54998623 = 2221 ⋅24763.

It can be written as a sum of positive squares in 2 ways, for example, as 13162384 + 19527561 = 3628^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 32689945 - 2¹⁹ = 32165657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32689895 and 32689904.

It is not an unprimeable number, because it can be changed into a prime (32689949) 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, 3268990 + ... + 3268999.

It is an arithmetic number, because the mean of its divisors is an integer number (9806985).

Almost surely, 2^32689945 is an apocalyptic number.

It is an amenable number.

32689945 is a deficient number, since it is larger than the sum of its proper divisors (6537995).

32689945 is an equidigital number, since it uses as much as digits as its factorization.

32689945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6537994.

The product of its digits is 466560, while the sum is 46.

The square root of 32689945 is about 5717.5121337869. The cubic root of 32689945 is about 319.7457126982.

The spelling of 32689945 in words is "thirty-two million, six hundred eighty-nine thousand, nine hundred forty-five".