681137414 has 4 divisors (see below), whose sum is σ = 1021706124. Its totient is φ = 340568706.

The previous prime is 681137339. The next prime is 681137437. The reversal of 681137414 is 414731186.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170284352 + ... + 170284355.

It is an arithmetic number, because the mean of its divisors is an integer number (255426531).

Almost surely, 2^681137414 is an apocalyptic number.

681137414 is a deficient number, since it is larger than the sum of its proper divisors (340568710).

681137414 is a wasteful number, since it uses less digits than its factorization.

681137414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340568709.

The product of its digits is 16128, while the sum is 35.

The square root of 681137414 is about 26098.6094265576. The cubic root of 681137414 is about 879.8559569676.

The spelling of 681137414 in words is "six hundred eighty-one million, one hundred thirty-seven thousand, four hundred fourteen".