653180981 has 2 divisors, whose sum is σ = 653180982. Its totient is φ = 653180980.

The previous prime is 653180977. The next prime is 653181013. The reversal of 653180981 is 189081356.

653180981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558896881 + 94284100 = 23641^2 + 9710^2 .

It is a cyclic number.

It is not a de Polignac number, because 653180981 - 2² = 653180977 is a prime.

It is a super-2 number, since 2×653180981² = 853290787880244722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653180951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326590490 + 326590491.

It is an arithmetic number, because the mean of its divisors is an integer number (326590491).

Almost surely, 2^653180981 is an apocalyptic number.

It is an amenable number.

653180981 is a deficient number, since it is larger than the sum of its proper divisors (1).

653180981 is an equidigital number, since it uses as much as digits as its factorization.

653180981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 653180981 is about 25557.4055999430. The cubic root of 653180981 is about 867.6498783470.

The spelling of 653180981 in words is "six hundred fifty-three million, one hundred eighty thousand, nine hundred eighty-one".