32420981 has 2 divisors, whose sum is σ = 32420982. Its totient is φ = 32420980.

The previous prime is 32420959. The next prime is 32421013. The reversal of 32420981 is 18902423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19061956 + 13359025 = 4366^2 + 3655^2 .

It is an emirp because it is prime and its reverse (18902423) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32420981 is a prime.

It is a super-2 number, since 2×32420981² = 2102240018004722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32420081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16210490 + 16210491.

It is an arithmetic number, because the mean of its divisors is an integer number (16210491).

Almost surely, 2^32420981 is an apocalyptic number.

It is an amenable number.

32420981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32420981 is an equidigital number, since it uses as much as digits as its factorization.

32420981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 32420981 is about 5693.9424830253. The cubic root of 32420981 is about 318.8663696084.

The spelling of 32420981 in words is "thirty-two million, four hundred twenty thousand, nine hundred eighty-one".