381704401 has 4 divisors (see below), whose sum is σ = 411066292. Its totient is φ = 352342512.

The previous prime is 381704387. The next prime is 381704419. The reversal of 381704401 is 104407183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104407183 = 17 ⋅6141599.

It can be written as a sum of positive squares in 2 ways, for example, as 26419600 + 355284801 = 5140^2 + 18849^2 .

It is a cyclic number.

It is not a de Polignac number, because 381704401 - 2⁷ = 381704273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381704401.

It is not an unprimeable number, because it can be changed into a prime (381704431) 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, 14680926 + ... + 14680951.

It is an arithmetic number, because the mean of its divisors is an integer number (102766573).

Almost surely, 2^381704401 is an apocalyptic number.

It is an amenable number.

381704401 is a deficient number, since it is larger than the sum of its proper divisors (29361891).

381704401 is a wasteful number, since it uses less digits than its factorization.

381704401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29361890.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 381704401 is about 19537.2567419277. The cubic root of 381704401 is about 725.3969453712.

The spelling of 381704401 in words is "three hundred eighty-one million, seven hundred four thousand, four hundred one".