1387922329 has 2 divisors, whose sum is σ = 1387922330. Its totient is φ = 1387922328.

The previous prime is 1387922311. The next prime is 1387922399. The reversal of 1387922329 is 9232297831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166359104 + 221563225 = 34152^2 + 14885^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387922329 - 2¹³ = 1387914137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387922399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693961164 + 693961165.

It is an arithmetic number, because the mean of its divisors is an integer number (693961165).

Almost surely, 2^1387922329 is an apocalyptic number.

It is an amenable number.

1387922329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387922329 is an equidigital number, since it uses as much as digits as its factorization.

1387922329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 1387922329 is about 37254.8296063745. The cubic root of 1387922329 is about 1115.4627045926.

The spelling of 1387922329 in words is "one billion, three hundred eighty-seven million, nine hundred twenty-two thousand, three hundred twenty-nine".