354906389 has 4 divisors (see below), whose sum is σ = 355012224. Its totient is φ = 354800556.

The previous prime is 354906371. The next prime is 354906397. The reversal of 354906389 is 983609453.

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 an emirpimes, since its reverse is a distinct semiprime: 983609453 = 139 ⋅7076327.

It is a cyclic number.

It is not a de Polignac number, because 354906389 - 2¹² = 354902293 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 (354906359) 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, 47717 + ... + 54650.

It is an arithmetic number, because the mean of its divisors is an integer number (88753056).

Almost surely, 2^354906389 is an apocalyptic number.

It is an amenable number.

354906389 is a deficient number, since it is larger than the sum of its proper divisors (105835).

354906389 is a wasteful number, since it uses less digits than its factorization.

354906389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105834.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 354906389 is about 18838.9593396238. The cubic root of 354906389 is about 708.0076319573.

The spelling of 354906389 in words is "three hundred fifty-four million, nine hundred six thousand, three hundred eighty-nine".