1683405407 has 4 divisors (see below), whose sum is σ = 1689354120. Its totient is φ = 1677456696.

The previous prime is 1683405379. The next prime is 1683405421. The reversal of 1683405407 is 7045043861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7045043861 = 853 ⋅8259137.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1683405407 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 (1683405487) 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, 2973932 + ... + 2974497.

It is an arithmetic number, because the mean of its divisors is an integer number (422338530).

Almost surely, 2^1683405407 is an apocalyptic number.

1683405407 is a deficient number, since it is larger than the sum of its proper divisors (5948713).

1683405407 is an equidigital number, since it uses as much as digits as its factorization.

1683405407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5948712.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1683405407 is about 41029.3237453410. The cubic root of 1683405407 is about 1189.5870815101.

The spelling of 1683405407 in words is "one billion, six hundred eighty-three million, four hundred five thousand, four hundred seven".