1387090069 has 2 divisors, whose sum is σ = 1387090070. Its totient is φ = 1387090068.

The previous prime is 1387090051. The next prime is 1387090091. The reversal of 1387090069 is 9600907831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1264655844 + 122434225 = 35562^2 + 11065^2 .

It is an emirp because it is prime and its reverse (9600907831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1387090069 - 2⁵ = 1387090037 is a prime.

It is a super-2 number, since 2×1387090069² = 3848037719036849522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387096069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693545034 + 693545035.

It is an arithmetic number, because the mean of its divisors is an integer number (693545035).

Almost surely, 2^1387090069 is an apocalyptic number.

It is an amenable number.

1387090069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387090069 is an equidigital number, since it uses as much as digits as its factorization.

1387090069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 1387090069 is about 37243.6581044344. The cubic root of 1387090069 is about 1115.2396996511.

The spelling of 1387090069 in words is "one billion, three hundred eighty-seven million, ninety thousand, sixty-nine".