401774381 has 4 divisors (see below), whose sum is σ = 415628700. Its totient is φ = 387920064.

The previous prime is 401774287. The next prime is 401774383. The reversal of 401774381 is 183477104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67798756 + 333975625 = 8234^2 + 18275^2 .

It is a cyclic number.

It is not a de Polignac number, because 401774381 - 2¹⁰ = 401773357 is a prime.

It is a super-2 number, since 2×401774381² = 322845306455866322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401774383) 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, 6927116 + ... + 6927173.

It is an arithmetic number, because the mean of its divisors is an integer number (103907175).

Almost surely, 2^401774381 is an apocalyptic number.

It is an amenable number.

401774381 is a deficient number, since it is larger than the sum of its proper divisors (13854319).

401774381 is a wasteful number, since it uses less digits than its factorization.

401774381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13854318.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 401774381 is about 20044.3104396235. The cubic root of 401774381 is about 737.8941719762.

The spelling of 401774381 in words is "four hundred one million, seven hundred seventy-four thousand, three hundred eighty-one".