354451621 has 4 divisors (see below), whose sum is σ = 354492000. Its totient is φ = 354411244.

The previous prime is 354451619. The next prime is 354451633. The reversal of 354451621 is 126154453.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 354451621 - 2¹ = 354451619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354421621) 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, 841 + ... + 26638.

It is an arithmetic number, because the mean of its divisors is an integer number (88623000).

Almost surely, 2^354451621 is an apocalyptic number.

It is an amenable number.

354451621 is a deficient number, since it is larger than the sum of its proper divisors (40379).

354451621 is a wasteful number, since it uses less digits than its factorization.

354451621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40378.

The product of its digits is 14400, while the sum is 31.

The square root of 354451621 is about 18826.8855894967. The cubic root of 354451621 is about 707.7050950555.

The spelling of 354451621 in words is "three hundred fifty-four million, four hundred fifty-one thousand, six hundred twenty-one".