353684421 has 16 divisors (see below), whose sum is σ = 524272320. Its totient is φ = 235656720.

The previous prime is 353684381. The next prime is 353684477. The reversal of 353684421 is 124486353.

353684421 is a `hidden beast` number, since 3 + 536 + 84 + 42 + 1 = 666.

It is not a de Polignac number, because 353684421 - 2⁹ = 353683909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353684321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77791 + ... + 82211.

It is an arithmetic number, because the mean of its divisors is an integer number (32767020).

Almost surely, 2^353684421 is an apocalyptic number.

It is an amenable number.

353684421 is a deficient number, since it is larger than the sum of its proper divisors (170587899).

353684421 is a wasteful number, since it uses less digits than its factorization.

353684421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7393 (or 7387 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 353684421 is about 18806.4994350358. The cubic root of 353684421 is about 707.1941240019.

The spelling of 353684421 in words is "three hundred fifty-three million, six hundred eighty-four thousand, four hundred twenty-one".