1376813 has 4 divisors (see below), whose sum is σ = 1457820. Its totient is φ = 1295808.

The previous prime is 1376789. The next prime is 1376819. The reversal of 1376813 is 3186731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3186731 = 53 ⋅60127.

It can be written as a sum of positive squares in 2 ways, for example, as 1214404 + 162409 = 1102^2 + 403^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1376813 is a prime.

It is a super-2 number, since 2×1376813² = 3791228073938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376819) 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, 40478 + ... + 40511.

It is an arithmetic number, because the mean of its divisors is an integer number (364455).

2^1376813 is an apocalyptic number.

It is an amenable number.

1376813 is a deficient number, since it is larger than the sum of its proper divisors (81007).

1376813 is an equidigital number, since it uses as much as digits as its factorization.

1376813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81006.

The product of its digits is 3024, while the sum is 29.

The square root of 1376813 is about 1173.3767510906. The cubic root of 1376813 is about 111.2478567108.

The spelling of 1376813 in words is "one million, three hundred seventy-six thousand, eight hundred thirteen".