3654343421 has 4 divisors (see below), whose sum is σ = 3656496000. Its totient is φ = 3652190844.

The previous prime is 3654343391. The next prime is 3654343439. The reversal of 3654343421 is 1243434563.

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: 1243434563 = 7 ⋅177633509.

It is a cyclic number.

It is not a de Polignac number, because 3654343421 - 2²² = 3650149117 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 (3654343921) 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, 1073741 + ... + 1077138.

It is an arithmetic number, because the mean of its divisors is an integer number (914124000).

Almost surely, 2^3654343421 is an apocalyptic number.

It is an amenable number.

3654343421 is a deficient number, since it is larger than the sum of its proper divisors (2152579).

3654343421 is a wasteful number, since it uses less digits than its factorization.

3654343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152578.

The product of its digits is 103680, while the sum is 35.

The square root of 3654343421 is about 60451.1655884318. The cubic root of 3654343421 is about 1540.2922115147.

Adding to 3654343421 its reverse (1243434563), we get a palindrome (4897777984).

The spelling of 3654343421 in words is "three billion, six hundred fifty-four million, three hundred forty-three thousand, four hundred twenty-one".