1387332397537 has 2 divisors, whose sum is σ = 1387332397538. Its totient is φ = 1387332397536.

The previous prime is 1387332397471. The next prime is 1387332397541. The reversal of 1387332397537 is 7357932337831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1377515352976 + 9817044561 = 1173676^2 + 99081^2 .

It is an emirp because it is prime and its reverse (7357932337831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387332397537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387332397567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693666198768 + 693666198769.

It is an arithmetic number, because the mean of its divisors is an integer number (693666198769).

Almost surely, 2^{1387332397537} is an apocalyptic number.

It is an amenable number.

1387332397537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387332397537 is an equidigital number, since it uses as much as digits as its factorization.

1387332397537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60011280, while the sum is 61.

The spelling of 1387332397537 in words is "one trillion, three hundred eighty-seven billion, three hundred thirty-two million, three hundred ninety-seven thousand, five hundred thirty-seven".