1387192189 has 2 divisors, whose sum is σ = 1387192190. Its totient is φ = 1387192188.

The previous prime is 1387192159. The next prime is 1387192193. The reversal of 1387192189 is 9812917831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1386966564 + 225625 = 37242^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387192189 - 2¹¹ = 1387190141 is a prime.

It is a super-2 number, since 2×1387192189² = 3848604338445223442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387192159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693596094 + 693596095.

It is an arithmetic number, because the mean of its divisors is an integer number (693596095).

Almost surely, 2^1387192189 is an apocalyptic number.

It is an amenable number.

1387192189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387192189 is an equidigital number, since it uses as much as digits as its factorization.

1387192189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 49.

The square root of 1387192189 is about 37245.0290508680. The cubic root of 1387192189 is about 1115.2670676127.

The spelling of 1387192189 in words is "one billion, three hundred eighty-seven million, one hundred ninety-two thousand, one hundred eighty-nine".