32872981 has 4 divisors (see below), whose sum is σ = 32894092. Its totient is φ = 32851872.

The previous prime is 32872967. The next prime is 32872991. The reversal of 32872981 is 18927823.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4036081 + 28836900 = 2009^2 + 5370^2 .

It is a cyclic number.

It is not a de Polignac number, because 32872981 - 2⁵ = 32872949 is a prime.

It is a super-2 number, since 2×32872981² = 2161265759652722, 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 (32872991) 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, 8016 + ... + 11401.

It is an arithmetic number, because the mean of its divisors is an integer number (8223523).

Almost surely, 2^32872981 is an apocalyptic number.

It is an amenable number.

32872981 is a deficient number, since it is larger than the sum of its proper divisors (21111).

32872981 is a wasteful number, since it uses less digits than its factorization.

32872981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21110.

The product of its digits is 48384, while the sum is 40.

The square root of 32872981 is about 5733.4964027197. The cubic root of 32872981 is about 320.3413707279.

The spelling of 32872981 in words is "thirty-two million, eight hundred seventy-two thousand, nine hundred eighty-one".