19600981 has 2 divisors, whose sum is σ = 19600982. Its totient is φ = 19600980.

The previous prime is 19600967. The next prime is 19601047. The reversal of 19600981 is 18900691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 152881 = 4410^2 + 391^2 .

It is an emirp because it is prime and its reverse (18900691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19600981 - 2¹¹ = 19598933 is a prime.

It is a super-2 number, since 2×19600981² = 768396912324722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19600901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9800490 + 9800491.

It is an arithmetic number, because the mean of its divisors is an integer number (9800491).

Almost surely, 2^19600981 is an apocalyptic number.

It is an amenable number.

19600981 is a deficient number, since it is larger than the sum of its proper divisors (1).

19600981 is an equidigital number, since it uses as much as digits as its factorization.

19600981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 19600981 is about 4427.2995155060. The cubic root of 19600981 is about 269.6244481537.

The spelling of 19600981 in words is "nineteen million, six hundred thousand, nine hundred eighty-one".