354666623 has 4 divisors (see below), whose sum is σ = 362914728. Its totient is φ = 346418520.

The previous prime is 354666581. The next prime is 354666667. The reversal of 354666623 is 326666453.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 354666623 - 2¹⁰ = 354665599 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 (354666023) 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, 4123988 + ... + 4124073.

It is an arithmetic number, because the mean of its divisors is an integer number (90728682).

Almost surely, 2^354666623 is an apocalyptic number.

354666623 is a deficient number, since it is larger than the sum of its proper divisors (8248105).

354666623 is an equidigital number, since it uses as much as digits as its factorization.

354666623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8248104.

The product of its digits is 466560, while the sum is 41.

The square root of 354666623 is about 18832.5946964299. The cubic root of 354666623 is about 707.8481585438.

The spelling of 354666623 in words is "three hundred fifty-four million, six hundred sixty-six thousand, six hundred twenty-three".