967699981 has 2 divisors, whose sum is σ = 967699982. Its totient is φ = 967699980.

The previous prime is 967699951. The next prime is 967700047. The reversal of 967699981 is 189996769.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649791081 + 317908900 = 25491^2 + 17830^2 .

It is an emirp because it is prime and its reverse (189996769) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 967699981 - 2⁷ = 967699853 is a prime.

It is a super-2 number, since 2×967699981² = 1872886506454800722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (967699951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 483849990 + 483849991.

It is an arithmetic number, because the mean of its divisors is an integer number (483849991).

Almost surely, 2^967699981 is an apocalyptic number.

It is an amenable number.

967699981 is a deficient number, since it is larger than the sum of its proper divisors (1).

967699981 is an equidigital number, since it uses as much as digits as its factorization.

967699981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 64.

The square root of 967699981 is about 31107.8765106203. The cubic root of 967699981 is about 989.1152797281.

It can be divided in two parts, 96 and 7699981, that added together give a palindrome (7700077).

The spelling of 967699981 in words is "nine hundred sixty-seven million, six hundred ninety-nine thousand, nine hundred eighty-one".