1399874213 has 4 divisors (see below), whose sum is σ = 1426286988. Its totient is φ = 1373461440.

The previous prime is 1399874209. The next prime is 1399874227. The reversal of 1399874213 is 3124789931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3124789931 = 389 ⋅8032879.

It can be written as a sum of positive squares in 2 ways, for example, as 1266078724 + 133795489 = 35582^2 + 11567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399874213 - 2² = 1399874209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399874263) 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, 13206308 + ... + 13206413.

It is an arithmetic number, because the mean of its divisors is an integer number (356571747).

Almost surely, 2^1399874213 is an apocalyptic number.

It is an amenable number.

1399874213 is a deficient number, since it is larger than the sum of its proper divisors (26412775).

1399874213 is an equidigital number, since it uses as much as digits as its factorization.

1399874213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26412774.

The product of its digits is 326592, while the sum is 47.

The square root of 1399874213 is about 37414.8929304896. The cubic root of 1399874213 is about 1118.6554371432.

The spelling of 1399874213 in words is "one billion, three hundred ninety-nine million, eight hundred seventy-four thousand, two hundred thirteen".