1389401471 has 2 divisors, whose sum is σ = 1389401472. Its totient is φ = 1389401470.

The previous prime is 1389401459. The next prime is 1389401477. The reversal of 1389401471 is 1741049831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1389401471 - 2⁶ = 1389401407 is a prime.

It is a super-3 number, since 3×1389401471³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389401477) 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 as a sum of consecutive naturals, namely, 694700735 + 694700736.

It is an arithmetic number, because the mean of its divisors is an integer number (694700736).

Almost surely, 2^1389401471 is an apocalyptic number.

1389401471 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389401471 is an equidigital number, since it uses as much as digits as its factorization.

1389401471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1389401471 is about 37274.6760012746. The cubic root of 1389401471 is about 1115.8588223305.

The spelling of 1389401471 in words is "one billion, three hundred eighty-nine million, four hundred one thousand, four hundred seventy-one".