1683450453 has 4 divisors (see below), whose sum is σ = 2244600608. Its totient is φ = 1122300300.

The previous prime is 1683450361. The next prime is 1683450463. The reversal of 1683450453 is 3540543861.

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: 3540543861 = 3 ⋅1180181287.

It is not a de Polignac number, because 1683450453 - 2¹³ = 1683442261 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 (1683450463) 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, 280575073 + ... + 280575078.

It is an arithmetic number, because the mean of its divisors is an integer number (561150152).

Almost surely, 2^1683450453 is an apocalyptic number.

It is an amenable number.

1683450453 is a deficient number, since it is larger than the sum of its proper divisors (561150155).

1683450453 is an equidigital number, since it uses as much as digits as its factorization.

1683450453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561150154.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 1683450453 is about 41029.8726905166. The cubic root of 1683450453 is about 1189.5976920779.

The spelling of 1683450453 in words is "one billion, six hundred eighty-three million, four hundred fifty thousand, four hundred fifty-three".