1376720213 has 12 divisors (see below), whose sum is σ = 1533993804. Its totient is φ = 1234411200.

The previous prime is 1376720179. The next prime is 1376720239. The reversal of 1376720213 is 3120276731.

It can be written as a sum of positive squares in 2 ways, for example, as 1145619409 + 231100804 = 33847^2 + 15202^2 .

It is not a de Polignac number, because 1376720213 - 2¹⁰ = 1376719189 is a prime.

It is a Duffinian number.

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 1376720213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376720273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69098 + ... + 86763.

It is an arithmetic number, because the mean of its divisors is an integer number (127832817).

Almost surely, 2^1376720213 is an apocalyptic number.

It is an amenable number.

1376720213 is a deficient number, since it is larger than the sum of its proper divisors (157273591).

1376720213 is a wasteful number, since it uses less digits than its factorization.

1376720213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155956 (or 155945 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 1376720213 is about 37104.1805326570. The cubic root of 1376720213 is about 1112.4535756077.

Adding to 1376720213 its reverse (3120276731), we get a palindrome (4496996944).

The spelling of 1376720213 in words is "one billion, three hundred seventy-six million, seven hundred twenty thousand, two hundred thirteen".