981769 has 2 divisors, whose sum is σ = 981770. Its totient is φ = 981768.

The previous prime is 981731. The next prime is 981797. The reversal of 981769 is 967189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976144 + 5625 = 988^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 981769 - 2¹⁵ = 949001 is a prime.

It is a super-2 number, since 2×981769² = 1927740738722, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (981569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490884 + 490885.

It is an arithmetic number, because the mean of its divisors is an integer number (490885).

2⁹⁸¹⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

981769 is a deficient number, since it is larger than the sum of its proper divisors (1).

981769 is an equidigital number, since it uses as much as digits as its factorization.

981769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 981769 is about 990.8425707447. The cubic root of 981769 is about 99.3885691425.

The spelling of 981769 in words is "nine hundred eighty-one thousand, seven hundred sixty-nine".