354663621 has 24 divisors (see below), whose sum is σ = 557179896. Its totient is φ = 216086400.

The previous prime is 354663607. The next prime is 354663637. The reversal of 354663621 is 126366453.

It can be written as a sum of positive squares in 4 ways, for example, as 3663396 + 351000225 = 1914^2 + 18735^2 .

It is not a de Polignac number, because 354663621 - 2⁷ = 354663493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354663601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3190 + ... + 26823.

It is an arithmetic number, because the mean of its divisors is an integer number (23215829).

Almost surely, 2^354663621 is an apocalyptic number.

It is an amenable number.

354663621 is a deficient number, since it is larger than the sum of its proper divisors (202516275).

354663621 is a wasteful number, since it uses less digits than its factorization.

354663621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30133 (or 30130 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 354663621 is about 18832.5149940203. The cubic root of 354663621 is about 707.8461613949.

The spelling of 354663621 in words is "three hundred fifty-four million, six hundred sixty-three thousand, six hundred twenty-one".