1672644473 has 4 divisors (see below), whose sum is σ = 1674872448. Its totient is φ = 1670416500.

The previous prime is 1672644377. The next prime is 1672644503. The reversal of 1672644473 is 3744462761.

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: 3744462761 = 13 ⋅288035597.

It is a cyclic number.

It is not a de Polignac number, because 1672644473 - 2¹⁰ = 1672643449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1672641473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112861 + ... + 1114362.

It is an arithmetic number, because the mean of its divisors is an integer number (418718112).

Almost surely, 2^1672644473 is an apocalyptic number.

It is an amenable number.

1672644473 is a deficient number, since it is larger than the sum of its proper divisors (2227975).

1672644473 is an equidigital number, since it uses as much as digits as its factorization.

1672644473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227974.

The product of its digits is 677376, while the sum is 44.

The square root of 1672644473 is about 40897.9763924818. The cubic root of 1672644473 is about 1187.0469047853.

The spelling of 1672644473 in words is "one billion, six hundred seventy-two million, six hundred forty-four thousand, four hundred seventy-three".