681339241 has 4 divisors (see below), whose sum is σ = 743279184. Its totient is φ = 619399300.

The previous prime is 681339229. The next prime is 681339247. The reversal of 681339241 is 142933186.

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 681339241 - 2¹⁷ = 681208169 is a prime.

It is a super-2 number, since 2×681339241² = 928446322652912162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681339241.

It is not an unprimeable number, because it can be changed into a prime (681339247) 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, 30969955 + ... + 30969976.

It is an arithmetic number, because the mean of its divisors is an integer number (185819796).

Almost surely, 2^681339241 is an apocalyptic number.

It is an amenable number.

681339241 is a deficient number, since it is larger than the sum of its proper divisors (61939943).

681339241 is a wasteful number, since it uses less digits than its factorization.

681339241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61939942.

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

The square root of 681339241 is about 26102.4757638045. The cubic root of 681339241 is about 879.9428514024.

The spelling of 681339241 in words is "six hundred eighty-one million, three hundred thirty-nine thousand, two hundred forty-one".