1391200493 has 4 divisors (see below), whose sum is σ = 1410258108. Its totient is φ = 1372142880.

The previous prime is 1391200487. The next prime is 1391200513. The reversal of 1391200493 is 3940021931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3940021931 = 43 ⋅91628417.

It can be written as a sum of positive squares in 2 ways, for example, as 500953924 + 890246569 = 22382^2 + 29837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391200493 - 2⁴ = 1391200477 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 (1391200403) 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, 9528698 + ... + 9528843.

It is an arithmetic number, because the mean of its divisors is an integer number (352564527).

Almost surely, 2^1391200493 is an apocalyptic number.

It is an amenable number.

1391200493 is a deficient number, since it is larger than the sum of its proper divisors (19057615).

1391200493 is an equidigital number, since it uses as much as digits as its factorization.

1391200493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19057614.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1391200493 is about 37298.8001549648. The cubic root of 1391200493 is about 1116.3402259674.

The spelling of 1391200493 in words is "one billion, three hundred ninety-one million, two hundred thousand, four hundred ninety-three".