354403421 has 4 divisors (see below), whose sum is σ = 361090332. Its totient is φ = 347716512.

The previous prime is 354403417. The next prime is 354403451. The reversal of 354403421 is 124304453.

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 320052100 + 34351321 = 17890^2 + 5861^2 .

It is a cyclic number.

It is not a de Polignac number, because 354403421 - 2² = 354403417 is a prime.

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 (354403411) 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, 3343376 + ... + 3343481.

It is an arithmetic number, because the mean of its divisors is an integer number (90272583).

Almost surely, 2^354403421 is an apocalyptic number.

It is an amenable number.

354403421 is a deficient number, since it is larger than the sum of its proper divisors (6686911).

354403421 is an equidigital number, since it uses as much as digits as its factorization.

354403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686910.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 354403421 is about 18825.6054617109. The cubic root of 354403421 is about 707.6730145778.

Adding to 354403421 its reverse (124304453), we get a palindrome (478707874).

The spelling of 354403421 in words is "three hundred fifty-four million, four hundred three thousand, four hundred twenty-one".