681401411 has 4 divisors (see below), whose sum is σ = 681533424. Its totient is φ = 681269400.

The previous prime is 681401407. The next prime is 681401417. The reversal of 681401411 is 114104186.

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

It is a cyclic number.

It is not a de Polignac number, because 681401411 - 2² = 681401407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681401417) 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, 57935 + ... + 68696.

It is an arithmetic number, because the mean of its divisors is an integer number (170383356).

Almost surely, 2^681401411 is an apocalyptic number.

681401411 is a deficient number, since it is larger than the sum of its proper divisors (132013).

681401411 is a wasteful number, since it uses less digits than its factorization.

681401411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132012.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 681401411 is about 26103.6666198448. Note that the first 4 decimals coincide. The cubic root of 681401411 is about 879.9696145672.

Adding to 681401411 its reverse (114104186), we get a palindrome (795505597).

The spelling of 681401411 in words is "six hundred eighty-one million, four hundred one thousand, four hundred eleven".