1388949 has 4 divisors (see below), whose sum is σ = 1851936. Its totient is φ = 925964.

The previous prime is 1388941. The next prime is 1388953. The reversal of 1388949 is 9498831.

1388949 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9498831 = 3 ⋅3166277.

It is a cyclic number.

It is not a de Polignac number, because 1388949 - 2³ = 1388941 is a prime.

It is a D-number.

1388949 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231489 + ... + 231494.

It is an arithmetic number, because the mean of its divisors is an integer number (462984).

2^1388949 is an apocalyptic number.

It is an amenable number.

1388949 is a deficient number, since it is larger than the sum of its proper divisors (462987).

1388949 is an equidigital number, since it uses as much as digits as its factorization.

1388949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462986.

The product of its digits is 62208, while the sum is 42.

The square root of 1388949 is about 1178.5368046862. The cubic root of 1388949 is about 111.5737679381.

The spelling of 1388949 in words is "one million, three hundred eighty-eight thousand, nine hundred forty-nine".