653978341 has 2 divisors, whose sum is σ = 653978342. Its totient is φ = 653978340.

The previous prime is 653978317. The next prime is 653978383. The reversal of 653978341 is 143879356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651321441 + 2656900 = 25521^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 653978341 - 2¹⁷ = 653847269 is a prime.

It is a super-2 number, since 2×653978341² = 855375340994224562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 653978291 and 653978300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653978041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326989170 + 326989171.

It is an arithmetic number, because the mean of its divisors is an integer number (326989171).

Almost surely, 2^653978341 is an apocalyptic number.

It is an amenable number.

653978341 is a deficient number, since it is larger than the sum of its proper divisors (1).

653978341 is an equidigital number, since it uses as much as digits as its factorization.

653978341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 653978341 is about 25573.0002346225. Note that the first 3 decimals coincide. The cubic root of 653978341 is about 868.0027912480.

The spelling of 653978341 in words is "six hundred fifty-three million, nine hundred seventy-eight thousand, three hundred forty-one".