981653 has 2 divisors, whose sum is σ = 981654. Its totient is φ = 981652.

The previous prime is 981637. The next prime is 981683. The reversal of 981653 is 356189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877969 + 103684 = 937^2 + 322^2 .

It is a cyclic number.

It is not a de Polignac number, because 981653 - 2⁴ = 981637 is a prime.

It is a super-2 number, since 2×981653² = 1927285224818, 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 (981623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490826 + 490827.

It is an arithmetic number, because the mean of its divisors is an integer number (490827).

2⁹⁸¹⁶⁵³ is an apocalyptic number.

It is an amenable number.

981653 is a deficient number, since it is larger than the sum of its proper divisors (1).

981653 is an equidigital number, since it uses as much as digits as its factorization.

981653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 981653 is about 990.7840329759. The cubic root of 981653 is about 99.3846546004.

The spelling of 981653 in words is "nine hundred eighty-one thousand, six hundred fifty-three".