681241279 has 8 divisors (see below), whose sum is σ = 690315392. Its totient is φ = 672214680.

The previous prime is 681241247. The next prime is 681241283. The reversal of 681241279 is 972142186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681241279 - 2⁵ = 681241247 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 (681241079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17464 + ... + 40834.

It is an arithmetic number, because the mean of its divisors is an integer number (86289424).

Almost surely, 2^681241279 is an apocalyptic number.

681241279 is a deficient number, since it is larger than the sum of its proper divisors (9074113).

681241279 is a wasteful number, since it uses less digits than its factorization.

681241279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23757.

The product of its digits is 48384, while the sum is 40.

The square root of 681241279 is about 26100.5992076810. The cubic root of 681241279 is about 879.9006770649.

The spelling of 681241279 in words is "six hundred eighty-one million, two hundred forty-one thousand, two hundred seventy-nine".