981367669 has 2 divisors, whose sum is σ = 981367670. Its totient is φ = 981367668.

The previous prime is 981367637. The next prime is 981367697. The reversal of 981367669 is 966763189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 936972100 + 44395569 = 30610^2 + 6663^2 .

It is a cyclic number.

It is not a de Polignac number, because 981367669 - 2⁵ = 981367637 is a prime.

It is a super-2 number, since 2×981367669² = 1926165003516987122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981367469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490683834 + 490683835.

It is an arithmetic number, because the mean of its divisors is an integer number (490683835).

Almost surely, 2^981367669 is an apocalyptic number.

It is an amenable number.

981367669 is a deficient number, since it is larger than the sum of its proper divisors (1).

981367669 is an equidigital number, since it uses as much as digits as its factorization.

981367669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The square root of 981367669 is about 31326.7883607624. The cubic root of 981367669 is about 993.7502449322.

The spelling of 981367669 in words is "nine hundred eighty-one million, three hundred sixty-seven thousand, six hundred sixty-nine".