139523768387 has 2 divisors, whose sum is σ = 139523768388. Its totient is φ = 139523768386.

The previous prime is 139523768359. The next prime is 139523768477. The reversal of 139523768387 is 783867325931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139523768387 - 2¹² = 139523764291 is a prime.

It is not a weakly prime, because it can be changed into another prime (139523768327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69761884193 + 69761884194.

It is an arithmetic number, because the mean of its divisors is an integer number (69761884194).

Almost surely, 2^139523768387 is an apocalyptic number.

139523768387 is a deficient number, since it is larger than the sum of its proper divisors (1).

139523768387 is an equidigital number, since it uses as much as digits as its factorization.

139523768387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45722880, while the sum is 62.

The spelling of 139523768387 in words is "one hundred thirty-nine billion, five hundred twenty-three million, seven hundred sixty-eight thousand, three hundred eighty-seven".