681029933 has 4 divisors (see below), whose sum is σ = 681126048. Its totient is φ = 680933820.

The previous prime is 681029891. The next prime is 681029959. The reversal of 681029933 is 339920186.

681029933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 681029933 - 2⁸ = 681029677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681029963) 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, 36503 + ... + 51908.

It is an arithmetic number, because the mean of its divisors is an integer number (170281512).

Almost surely, 2^681029933 is an apocalyptic number.

It is an amenable number.

681029933 is a deficient number, since it is larger than the sum of its proper divisors (96115).

681029933 is an equidigital number, since it uses as much as digits as its factorization.

681029933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96114.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 681029933 is about 26096.5502126239. The cubic root of 681029933 is about 879.8096751794.

The spelling of 681029933 in words is "six hundred eighty-one million, twenty-nine thousand, nine hundred thirty-three".