1398931 has 4 divisors (see below), whose sum is σ = 1447200. Its totient is φ = 1350664.

The previous prime is 1398911. The next prime is 1398967.

1398931 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1398931 - 2¹⁵ = 1366163 is a prime.

It is a super-2 number, since 2×1398931² = 3914015885522, which contains 22 as substring.

It is a Duffinian number.

1398931 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1398911) 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, 24091 + ... + 24148.

It is an arithmetic number, because the mean of its divisors is an integer number (361800).

2^1398931 is an apocalyptic number.

1398931 is a deficient number, since it is larger than the sum of its proper divisors (48269).

1398931 is an equidigital number, since it uses as much as digits as its factorization.

1398931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48268.

The product of its digits is 5832, while the sum is 34.

The square root of 1398931 is about 1182.7641354049. The cubic root of 1398931 is about 111.8404136608.

The spelling of 1398931 in words is "one million, three hundred ninety-eight thousand, nine hundred thirty-one".