681153529 has 4 divisors (see below), whose sum is σ = 778461184. Its totient is φ = 583845876.

The previous prime is 681153521. The next prime is 681153593. The reversal of 681153529 is 925351186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 681153529 - 2³ = 681153521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 681153491 and 681153500.

It is not an unprimeable number, because it can be changed into a prime (681153521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48653817 + ... + 48653830.

It is an arithmetic number, because the mean of its divisors is an integer number (194615296).

Almost surely, 2^681153529 is an apocalyptic number.

It is an amenable number.

681153529 is a deficient number, since it is larger than the sum of its proper divisors (97307655).

681153529 is an equidigital number, since it uses as much as digits as its factorization.

681153529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97307654.

The product of its digits is 64800, while the sum is 40.

The square root of 681153529 is about 26098.9181576555. The cubic root of 681153529 is about 879.8628957373.

The spelling of 681153529 in words is "six hundred eighty-one million, one hundred fifty-three thousand, five hundred twenty-nine".