1673721472 has 16 divisors (see below), whose sum is σ = 3334367250. Its totient is φ = 836860672.

The previous prime is 1673721461. The next prime is 1673721473. The reversal of 1673721472 is 2741273761.

It can be written as a sum of positive squares in only one way, i.e., 1572598336 + 101123136 = 39656^2 + 10056^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1673721473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6537847 + ... + 6538102.

Almost surely, 2^1673721472 is an apocalyptic number.

It is an amenable number.

1673721472 is a deficient number, since it is larger than the sum of its proper divisors (1660645778).

1673721472 is an equidigital number, since it uses as much as digits as its factorization.

1673721472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13075963 (or 13075951 counting only the distinct ones).

The product of its digits is 98784, while the sum is 40.

The square root of 1673721472 is about 40911.1411720573. The cubic root of 1673721472 is about 1187.3016259878.

The spelling of 1673721472 in words is "one billion, six hundred seventy-three million, seven hundred twenty-one thousand, four hundred seventy-two".