1378949 has 8 divisors (see below), whose sum is σ = 1620192. Its totient is φ = 1157040.

The previous prime is 1378943. The next prime is 1378957. The reversal of 1378949 is 9498731.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1378949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378943) 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, 4679 + ... + 4964.

It is an arithmetic number, because the mean of its divisors is an integer number (202524).

2^1378949 is an apocalyptic number.

It is an amenable number.

1378949 is a deficient number, since it is larger than the sum of its proper divisors (241243).

1378949 is a wasteful number, since it uses less digits than its factorization.

1378949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9667.

The product of its digits is 54432, while the sum is 41.

The square root of 1378949 is about 1174.2865919357. The cubic root of 1378949 is about 111.3053572920.

The spelling of 1378949 in words is "one million, three hundred seventy-eight thousand, nine hundred forty-nine".