1672805213 has 2 divisors, whose sum is σ = 1672805214. Its totient is φ = 1672805212.

The previous prime is 1672805191. The next prime is 1672805243. The reversal of 1672805213 is 3125082761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1519986169 + 152819044 = 38987^2 + 12362^2 .

It is an emirp because it is prime and its reverse (3125082761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1672805213 - 2⁶ = 1672805149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1672805243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836402606 + 836402607.

It is an arithmetic number, because the mean of its divisors is an integer number (836402607).

Almost surely, 2^1672805213 is an apocalyptic number.

It is an amenable number.

1672805213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672805213 is an equidigital number, since it uses as much as digits as its factorization.

1672805213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1672805213 is about 40899.9414791757. The cubic root of 1672805213 is about 1187.0849283683.

Adding to 1672805213 its reverse (3125082761), we get a palindrome (4797887974).

The spelling of 1672805213 in words is "one billion, six hundred seventy-two million, eight hundred five thousand, two hundred thirteen".