353630421 has 16 divisors (see below), whose sum is σ = 524198400. Its totient is φ = 235617984.

The previous prime is 353630401. The next prime is 353630429. The reversal of 353630421 is 124036353.

It is a happy number.

353630421 is a `hidden beast` number, since 3 + 5 + 3 + 630 + 4 + 21 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-353630421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353630429) 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, 71005 + ... + 75821.

It is an arithmetic number, because the mean of its divisors is an integer number (32762400).

Almost surely, 2^353630421 is an apocalyptic number.

It is an amenable number.

353630421 is a deficient number, since it is larger than the sum of its proper divisors (170567979).

353630421 is a wasteful number, since it uses less digits than its factorization.

353630421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7545 (or 7539 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 353630421 is about 18805.0637063531. The cubic root of 353630421 is about 707.1581310619.

Adding to 353630421 its reverse (124036353), we get a palindrome (477666774).

The spelling of 353630421 in words is "three hundred fifty-three million, six hundred thirty thousand, four hundred twenty-one".