1399123253 has 4 divisors (see below), whose sum is σ = 1526316288. Its totient is φ = 1271930220.

The previous prime is 1399123223. The next prime is 1399123283. The reversal of 1399123253 is 3523219931.

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 an interprime number because it is at equal distance from previous prime (1399123223) and next prime (1399123283).

It is not a de Polignac number, because 1399123253 - 2¹⁶ = 1399057717 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 (1399123223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63596501 + ... + 63596522.

It is an arithmetic number, because the mean of its divisors is an integer number (381579072).

Almost surely, 2^1399123253 is an apocalyptic number.

It is an amenable number.

1399123253 is a deficient number, since it is larger than the sum of its proper divisors (127193035).

1399123253 is a wasteful number, since it uses less digits than its factorization.

1399123253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127193034.

The product of its digits is 43740, while the sum is 38.

The square root of 1399123253 is about 37404.8560082779. The cubic root of 1399123253 is about 1118.4553677985.

The spelling of 1399123253 in words is "one billion, three hundred ninety-nine million, one hundred twenty-three thousand, two hundred fifty-three".