1378899 has 12 divisors (see below), whose sum is σ = 2002000. Its totient is φ = 914544.

The previous prime is 1378859. The next prime is 1378903. The reversal of 1378899 is 9988731.

1378899 = T₃₀₆ + T₃₀₇ + ... + T₃₃₂.

It is not a de Polignac number, because 1378899 - 2⁹ = 1378387 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1378859) 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, 2922 + ... + 3360.

2^1378899 is an apocalyptic number.

1378899 is a deficient number, since it is larger than the sum of its proper divisors (623101).

1378899 is a wasteful number, since it uses less digits than its factorization.

1378899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 791 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1378899 is about 1174.2653022209. The cubic root of 1378899 is about 111.3040119835.

The spelling of 1378899 in words is "one million, three hundred seventy-eight thousand, eight hundred ninety-nine".