1389046277 has 2 divisors, whose sum is σ = 1389046278. Its totient is φ = 1389046276.

The previous prime is 1389046249. The next prime is 1389046289. The reversal of 1389046277 is 7726409831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1132053316 + 256992961 = 33646^2 + 16031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389046277 - 2⁶ = 1389046213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389046297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694523138 + 694523139.

It is an arithmetic number, because the mean of its divisors is an integer number (694523139).

Almost surely, 2^1389046277 is an apocalyptic number.

It is an amenable number.

1389046277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389046277 is an equidigital number, since it uses as much as digits as its factorization.

1389046277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 1389046277 is about 37269.9111482708. The cubic root of 1389046277 is about 1115.7637261935.

The spelling of 1389046277 in words is "one billion, three hundred eighty-nine million, forty-six thousand, two hundred seventy-seven".