1378977 has 8 divisors (see below), whose sum is σ = 1844064. Its totient is φ = 916608.

The previous prime is 1378969. The next prime is 1378997. The reversal of 1378977 is 7798731.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1378977 - 2³ = 1378969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1378907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1678 + ... + 2360.

It is an arithmetic number, because the mean of its divisors is an integer number (230508).

2^1378977 is an apocalyptic number.

It is an amenable number.

1378977 is a deficient number, since it is larger than the sum of its proper divisors (465087).

1378977 is an equidigital number, since it uses as much as digits as its factorization.

1378977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359.

The product of its digits is 74088, while the sum is 42.

The square root of 1378977 is about 1174.2985140074. The cubic root of 1378977 is about 111.3061106505.

The spelling of 1378977 in words is "one million, three hundred seventy-eight thousand, nine hundred seventy-seven".