1398869 has 4 divisors (see below), whose sum is σ = 1404096. Its totient is φ = 1393644.

The previous prime is 1398863. The next prime is 1398871. The reversal of 1398869 is 9688931.

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.

It is a cyclic number.

It is not a de Polignac number, because 1398869 - 2²⁰ = 350293 is a prime.

It is a super-2 number, since 2×1398869² = 3913668958322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398863) 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, 2189 + ... + 2754.

It is an arithmetic number, because the mean of its divisors is an integer number (351024).

2^1398869 is an apocalyptic number.

It is an amenable number.

1398869 is a deficient number, since it is larger than the sum of its proper divisors (5227).

1398869 is an equidigital number, since it uses as much as digits as its factorization.

1398869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226.

The product of its digits is 93312, while the sum is 44.

The square root of 1398869 is about 1182.7379253241. The cubic root of 1398869 is about 111.8387613973.

The spelling of 1398869 in words is "one million, three hundred ninety-eight thousand, eight hundred sixty-nine".