401659893 has 12 divisors (see below), whose sum is σ = 581520940. Its totient is φ = 267152256.

The previous prime is 401659891. The next prime is 401659913. The reversal of 401659893 is 398956104.

It is a happy number.

401659893 is a `hidden beast` number, since 40 + 16 + 598 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 191351889 + 210308004 = 13833^2 + 14502^2 .

It is not a de Polignac number, because 401659893 - 2¹ = 401659891 is a prime.

It is a super-2 number, since 2×401659893² = 322661339289542898, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401659891) 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, 47638 + ... + 55431.

Almost surely, 2^401659893 is an apocalyptic number.

It is an amenable number.

401659893 is a deficient number, since it is larger than the sum of its proper divisors (179861047).

401659893 is a wasteful number, since it uses less digits than its factorization.

401659893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103508 (or 103505 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 401659893 is about 20041.4543633939. The cubic root of 401659893 is about 737.8240762063.

The spelling of 401659893 in words is "four hundred one million, six hundred fifty-nine thousand, eight hundred ninety-three".