1379867 has 2 divisors, whose sum is σ = 1379868. Its totient is φ = 1379866.

The previous prime is 1379857. The next prime is 1379869. The reversal of 1379867 is 7689731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1379867 - 2⁶ = 1379803 is a prime.

Together with 1379869, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1379869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689933 + 689934.

It is an arithmetic number, because the mean of its divisors is an integer number (689934).

2^1379867 is an apocalyptic number.

1379867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379867 is an equidigital number, since it uses as much as digits as its factorization.

1379867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 1379867 is about 1174.6774025238. The cubic root of 1379867 is about 111.3300513772.

The spelling of 1379867 in words is "one million, three hundred seventy-nine thousand, eight hundred sixty-seven".