32371981 has 2 divisors, whose sum is σ = 32371982. Its totient is φ = 32371980.

The previous prime is 32371957. The next prime is 32372009. The reversal of 32371981 is 18917323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20331081 + 12040900 = 4509^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 32371981 - 2⁵ = 32371949 is a prime.

It is a super-2 number, since 2×32371981² = 2095890307728722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32371081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16185990 + 16185991.

It is an arithmetic number, because the mean of its divisors is an integer number (16185991).

Almost surely, 2^32371981 is an apocalyptic number.

It is an amenable number.

32371981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32371981 is an equidigital number, since it uses as much as digits as its factorization.

32371981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 32371981 is about 5689.6380376962. The cubic root of 32371981 is about 318.7056472441.

The spelling of 32371981 in words is "thirty-two million, three hundred seventy-one thousand, nine hundred eighty-one".