681053029 has 2 divisors, whose sum is σ = 681053030. Its totient is φ = 681053028.

The previous prime is 681053027. The next prime is 681053033. The reversal of 681053029 is 920350186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552344004 + 128709025 = 23502^2 + 11345^2 .

It is a cyclic number.

It is not a de Polignac number, because 681053029 - 2¹ = 681053027 is a prime.

Together with 681053027, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 681052985 and 681053003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681053027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340526514 + 340526515.

It is an arithmetic number, because the mean of its divisors is an integer number (340526515).

Almost surely, 2^681053029 is an apocalyptic number.

It is an amenable number.

681053029 is a deficient number, since it is larger than the sum of its proper divisors (1).

681053029 is an equidigital number, since it uses as much as digits as its factorization.

681053029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 681053029 is about 26096.9927194687. The cubic root of 681053029 is about 879.8196208287.

The spelling of 681053029 in words is "six hundred eighty-one million, fifty-three thousand, twenty-nine".