1388541377 has 2 divisors, whose sum is σ = 1388541378. Its totient is φ = 1388541376.

The previous prime is 1388541361. The next prime is 1388541379. The reversal of 1388541377 is 7731458831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1347183616 + 41357761 = 36704^2 + 6431^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388541377 - 2⁴ = 1388541361 is a prime.

It is a super-2 number, since 2×1388541377² = 3856094311282112258, which contains 22 as substring.

Together with 1388541379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1388541379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694270688 + 694270689.

It is an arithmetic number, because the mean of its divisors is an integer number (694270689).

Almost surely, 2^1388541377 is an apocalyptic number.

It is an amenable number.

1388541377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388541377 is an equidigital number, since it uses as much as digits as its factorization.

1388541377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 47.

The square root of 1388541377 is about 37263.1369720801. The cubic root of 1388541377 is about 1115.6285213446.

The spelling of 1388541377 in words is "one billion, three hundred eighty-eight million, five hundred forty-one thousand, three hundred seventy-seven".