1389053761 has 4 divisors (see below), whose sum is σ = 1406636800. Its totient is φ = 1371470724.

The previous prime is 1389053717. The next prime is 1389053779. The reversal of 1389053761 is 1673509831.

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 1389053761 - 2⁹ = 1389053249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389054761) 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, 8791401 + ... + 8791558.

It is an arithmetic number, because the mean of its divisors is an integer number (351659200).

Almost surely, 2^1389053761 is an apocalyptic number.

It is an amenable number.

1389053761 is a deficient number, since it is larger than the sum of its proper divisors (17583039).

1389053761 is an equidigital number, since it uses as much as digits as its factorization.

1389053761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17583038.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1389053761 is about 37270.0115508434. The cubic root of 1389053761 is about 1115.7657300530.

The spelling of 1389053761 in words is "one billion, three hundred eighty-nine million, fifty-three thousand, seven hundred sixty-one".