1378031 has 2 divisors, whose sum is σ = 1378032. Its totient is φ = 1378030.

The previous prime is 1378019. The next prime is 1378033. The reversal of 1378031 is 1308731.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1308731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378031 - 2⁶ = 1377967 is a prime.

It is a super-2 number, since 2×1378031² = 3797938873922, which contains 22 as substring.

Together with 1378033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377988 and 1378006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689015 + 689016.

It is an arithmetic number, because the mean of its divisors is an integer number (689016).

2^1378031 is an apocalyptic number.

1378031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378031 is an equidigital number, since it uses as much as digits as its factorization.

1378031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1378031 is about 1173.8956512399. The cubic root of 1378031 is about 111.2806522447.

The spelling of 1378031 in words is "one million, three hundred seventy-eight thousand, thirty-one".