1380790221 has 4 divisors (see below), whose sum is σ = 1841053632. Its totient is φ = 920526812.

The previous prime is 1380790219. The next prime is 1380790261. The reversal of 1380790221 is 1220970831.

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 1380790221 - 2¹ = 1380790219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380790261) 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, 230131701 + ... + 230131706.

It is an arithmetic number, because the mean of its divisors is an integer number (460263408).

Almost surely, 2^1380790221 is an apocalyptic number.

It is an amenable number.

1380790221 is a deficient number, since it is larger than the sum of its proper divisors (460263411).

1380790221 is an equidigital number, since it uses as much as digits as its factorization.

1380790221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460263410.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1380790221 is about 37158.9857369654. The cubic root of 1380790221 is about 1113.5487486309.

The spelling of 1380790221 in words is "one billion, three hundred eighty million, seven hundred ninety thousand, two hundred twenty-one".