1672814945 has 4 divisors (see below), whose sum is σ = 2007377940. Its totient is φ = 1338251952.

The previous prime is 1672814903. The next prime is 1672814947. The reversal of 1672814945 is 5494182761.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 761318464 + 911496481 = 27592^2 + 30191^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672814945 - 2¹⁰ = 1672813921 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1672814945.

It is not an unprimeable number, because it can be changed into a prime (1672814947) 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, 167281490 + ... + 167281499.

It is an arithmetic number, because the mean of its divisors is an integer number (501844485).

Almost surely, 2^1672814945 is an apocalyptic number.

It is an amenable number.

1672814945 is a deficient number, since it is larger than the sum of its proper divisors (334562995).

1672814945 is an equidigital number, since it uses as much as digits as its factorization.

1672814945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334562994.

The product of its digits is 483840, while the sum is 47.

The square root of 1672814945 is about 40900.0604522781. The cubic root of 1672814945 is about 1187.0872304272.

The spelling of 1672814945 in words is "one billion, six hundred seventy-two million, eight hundred fourteen thousand, nine hundred forty-five".