1399947253 has 2 divisors, whose sum is σ = 1399947254. Its totient is φ = 1399947252.

The previous prime is 1399947239. The next prime is 1399947271. The reversal of 1399947253 is 3527499931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1217102769 + 182844484 = 34887^2 + 13522^2 .

It is an emirp because it is prime and its reverse (3527499931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1399947253 - 2¹³ = 1399939061 is a prime.

It is a super-2 number, since 2×1399947253² = 3919704622364492018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1399947253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399947203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699973626 + 699973627.

It is an arithmetic number, because the mean of its divisors is an integer number (699973627).

Almost surely, 2^1399947253 is an apocalyptic number.

It is an amenable number.

1399947253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399947253 is an equidigital number, since it uses as much as digits as its factorization.

1399947253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 52.

The square root of 1399947253 is about 37415.8689996638. The cubic root of 1399947253 is about 1118.6748925036.

The spelling of 1399947253 in words is "one billion, three hundred ninety-nine million, nine hundred forty-seven thousand, two hundred fifty-three".