1390361389 has 4 divisors (see below), whose sum is σ = 1397640960. Its totient is φ = 1383081820.

The previous prime is 1390361353. The next prime is 1390361417. The reversal of 1390361389 is 9831630931.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9831630931 = 30403 ⋅323377.

It is a cyclic number.

It is not a de Polignac number, because 1390361389 - 2²⁷ = 1256143661 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 (1390361789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3639499 + ... + 3639880.

It is an arithmetic number, because the mean of its divisors is an integer number (349410240).

Almost surely, 2^1390361389 is an apocalyptic number.

It is an amenable number.

1390361389 is a deficient number, since it is larger than the sum of its proper divisors (7279571).

1390361389 is an equidigital number, since it uses as much as digits as its factorization.

1390361389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7279570.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 1390361389 is about 37287.5500536037. The cubic root of 1390361389 is about 1116.1157402454.

The spelling of 1390361389 in words is "one billion, three hundred ninety million, three hundred sixty-one thousand, three hundred eighty-nine".