1390841449 has 4 divisors (see below), whose sum is σ = 1395313920. Its totient is φ = 1386368980.

The previous prime is 1390841377. The next prime is 1390841453. The reversal of 1390841449 is 9441480931.

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 a cyclic number.

It is not a de Polignac number, because 1390841449 - 2⁹ = 1390840937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390841849) 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, 2235769 + ... + 2236390.

It is an arithmetic number, because the mean of its divisors is an integer number (348828480).

Almost surely, 2^1390841449 is an apocalyptic number.

It is an amenable number.

1390841449 is a deficient number, since it is larger than the sum of its proper divisors (4472471).

1390841449 is an equidigital number, since it uses as much as digits as its factorization.

1390841449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472470.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1390841449 is about 37293.9867673061. The cubic root of 1390841449 is about 1116.2441818797.

The spelling of 1390841449 in words is "one billion, three hundred ninety million, eight hundred forty-one thousand, four hundred forty-nine".