1878913 has 2 divisors, whose sum is σ = 1878914. Its totient is φ = 1878912.

The previous prime is 1878911. The next prime is 1878931. The reversal of 1878913 is 3198781.

Together with next prime (1878931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1227664 + 651249 = 1108^2 + 807^2 .

It is a cyclic number.

It is not a de Polignac number, because 1878913 - 2¹ = 1878911 is a prime.

Together with 1878911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1878911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 939456 + 939457.

It is an arithmetic number, because the mean of its divisors is an integer number (939457).

2^1878913 is an apocalyptic number.

It is an amenable number.

1878913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1878913 is an equidigital number, since it uses as much as digits as its factorization.

1878913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 37.

The square root of 1878913 is about 1370.7344746522. The cubic root of 1878913 is about 123.3963244494.

The spelling of 1878913 in words is "one million, eight hundred seventy-eight thousand, nine hundred thirteen".