32709981 has 4 divisors (see below), whose sum is σ = 43613312. Its totient is φ = 21806652.

The previous prime is 32709977. The next prime is 32710009. The reversal of 32709981 is 18990723.

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 not a de Polignac number, because 32709981 - 2² = 32709977 is a prime.

It is a super-2 number, since 2×32709981² = 2139885714040722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32709931) 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, 5451661 + ... + 5451666.

It is an arithmetic number, because the mean of its divisors is an integer number (10903328).

Almost surely, 2^32709981 is an apocalyptic number.

It is an amenable number.

32709981 is a deficient number, since it is larger than the sum of its proper divisors (10903331).

32709981 is a wasteful number, since it uses less digits than its factorization.

32709981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10903330.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 32709981 is about 5719.2640260789. The cubic root of 32709981 is about 319.8110244905.

The spelling of 32709981 in words is "thirty-two million, seven hundred nine thousand, nine hundred eighty-one".