681326902 has 4 divisors (see below), whose sum is σ = 1021990356. Its totient is φ = 340663450.

The previous prime is 681326881. The next prime is 681326903. The reversal of 681326902 is 209623186.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681326903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170331724 + ... + 170331727.

It is an arithmetic number, because the mean of its divisors is an integer number (255497589).

Almost surely, 2^681326902 is an apocalyptic number.

681326902 is a deficient number, since it is larger than the sum of its proper divisors (340663454).

681326902 is a wasteful number, since it uses less digits than its factorization.

681326902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340663453.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 681326902 is about 26102.2394058441. The cubic root of 681326902 is about 879.9375394717.

The spelling of 681326902 in words is "six hundred eighty-one million, three hundred twenty-six thousand, nine hundred two".