1391330453 has 2 divisors, whose sum is σ = 1391330454. Its totient is φ = 1391330452.

The previous prime is 1391330407. The next prime is 1391330471. The reversal of 1391330453 is 3540331931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1235030449 + 156300004 = 35143^2 + 12502^2 .

It is an emirp because it is prime and its reverse (3540331931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1391330453 - 2²⁰ = 1390281877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391330653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695665226 + 695665227.

It is an arithmetic number, because the mean of its divisors is an integer number (695665227).

Almost surely, 2^1391330453 is an apocalyptic number.

It is an amenable number.

1391330453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391330453 is an equidigital number, since it uses as much as digits as its factorization.

1391330453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 32.

The square root of 1391330453 is about 37300.5422614739. The cubic root of 1391330453 is about 1116.3749861281.

The spelling of 1391330453 in words is "one billion, three hundred ninety-one million, three hundred thirty thousand, four hundred fifty-three".