1397814231 has 32 divisors (see below), whose sum is σ = 2096914176. Its totient is φ = 820800000.

The previous prime is 1397814227. The next prime is 1397814241. The reversal of 1397814231 is 1324187931.

It is not a de Polignac number, because 1397814231 - 2² = 1397814227 is a prime.

It is a super-2 number, since 2×1397814231² = 3907769248772242722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1397814231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397814241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304191 + ... + 308751.

It is an arithmetic number, because the mean of its divisors is an integer number (65528568).

Almost surely, 2^1397814231 is an apocalyptic number.

1397814231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1397814231 is a deficient number, since it is larger than the sum of its proper divisors (699099945).

1397814231 is a wasteful number, since it uses less digits than its factorization.

1397814231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863.

The product of its digits is 36288, while the sum is 39.

The square root of 1397814231 is about 37387.3538913895. The cubic root of 1397814231 is about 1118.1064494036.

The spelling of 1397814231 in words is "one billion, three hundred ninety-seven million, eight hundred fourteen thousand, two hundred thirty-one".