681379401 has 4 divisors (see below), whose sum is σ = 908505872. Its totient is φ = 454252932.

The previous prime is 681379381. The next prime is 681379417. The reversal of 681379401 is 104973186.

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 not a de Polignac number, because 681379401 - 2⁶ = 681379337 is a prime.

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 681379401.

It is not an unprimeable number, because it can be changed into a prime (681379471) 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, 113563231 + ... + 113563236.

It is an arithmetic number, because the mean of its divisors is an integer number (227126468).

Almost surely, 2^681379401 is an apocalyptic number.

It is an amenable number.

681379401 is a deficient number, since it is larger than the sum of its proper divisors (227126471).

681379401 is a wasteful number, since it uses less digits than its factorization.

681379401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227126470.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 681379401 is about 26103.2450281569. The cubic root of 681379401 is about 879.9601398095.

The spelling of 681379401 in words is "six hundred eighty-one million, three hundred seventy-nine thousand, four hundred one".