1389284137 has 2 divisors, whose sum is σ = 1389284138. Its totient is φ = 1389284136.

The previous prime is 1389284093. The next prime is 1389284167. The reversal of 1389284137 is 7314829831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1312178176 + 77105961 = 36224^2 + 8781^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389284137 - 2²⁷ = 1255066409 is a prime.

It is a super-2 number, since 2×1389284137² = 3860220826639669538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1389284167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694642068 + 694642069.

It is an arithmetic number, because the mean of its divisors is an integer number (694642069).

Almost surely, 2^1389284137 is an apocalyptic number.

It is an amenable number.

1389284137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389284137 is an equidigital number, since it uses as much as digits as its factorization.

1389284137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 1389284137 is about 37273.1020576501. The cubic root of 1389284137 is about 1115.8274102758.

The spelling of 1389284137 in words is "one billion, three hundred eighty-nine million, two hundred eighty-four thousand, one hundred thirty-seven".