1398969 has 24 divisors (see below), whose sum is σ = 2376192. Its totient is φ = 781920.

The previous prime is 1398967. The next prime is 1398973. The reversal of 1398969 is 9698931.

It is not a de Polignac number, because 1398969 - 2¹ = 1398967 is a prime.

It is a super-2 number, since 2×1398969² = 3914228525922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1398967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 744 + ... + 1830.

It is an arithmetic number, because the mean of its divisors is an integer number (99008).

2^1398969 is an apocalyptic number.

It is an amenable number.

1398969 is a deficient number, since it is larger than the sum of its proper divisors (977223).

1398969 is a wasteful number, since it uses less digits than its factorization.

1398969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1114 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 1398969 is about 1182.7801993608. The cubic root of 1398969 is about 111.8414263143.

The spelling of 1398969 in words is "one million, three hundred ninety-eight thousand, nine hundred sixty-nine".