401989293 has 12 divisors (see below), whose sum is σ = 614807388. Its totient is φ = 252228480.

The previous prime is 401989253. The next prime is 401989303. The reversal of 401989293 is 392989104.

It can be written as a sum of positive squares in 2 ways, for example, as 329858244 + 72131049 = 18162^2 + 8493^2 .

It is not a de Polignac number, because 401989293 - 2⁶ = 401989229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401989223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1313538 + ... + 1313843.

It is an arithmetic number, because the mean of its divisors is an integer number (51233949).

Almost surely, 2^401989293 is an apocalyptic number.

It is an amenable number.

401989293 is a deficient number, since it is larger than the sum of its proper divisors (212818095).

401989293 is a wasteful number, since it uses less digits than its factorization.

401989293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627404 (or 2627401 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 401989293 is about 20049.6706456740. The cubic root of 401989293 is about 738.0257168204.

The spelling of 401989293 in words is "four hundred one million, nine hundred eighty-nine thousand, two hundred ninety-three".