401031493 has 4 divisors (see below), whose sum is σ = 411870220. Its totient is φ = 390192768.

The previous prime is 401031481. The next prime is 401031497. The reversal of 401031493 is 394130104.

It is a happy number.

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 192460129 + 208571364 = 13873^2 + 14442^2 .

It is a cyclic number.

It is not a de Polignac number, because 401031493 - 2¹⁷ = 400900421 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 (401031497) 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, 5419308 + ... + 5419381.

It is an arithmetic number, because the mean of its divisors is an integer number (102967555).

Almost surely, 2^401031493 is an apocalyptic number.

It is an amenable number.

401031493 is a deficient number, since it is larger than the sum of its proper divisors (10838727).

401031493 is a wasteful number, since it uses less digits than its factorization.

401031493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10838726.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 401031493 is about 20025.7707217475. The cubic root of 401031493 is about 737.4390982171.

Adding to 401031493 its reverse (394130104), we get a palindrome (795161597).

The spelling of 401031493 in words is "four hundred one million, thirty-one thousand, four hundred ninety-three".