139308247487 has 2 divisors, whose sum is σ = 139308247488. Its totient is φ = 139308247486.

The previous prime is 139308247433. The next prime is 139308247523. The reversal of 139308247487 is 784742803931.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (784742803931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139308247487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139308247417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69654123743 + 69654123744.

It is an arithmetic number, because the mean of its divisors is an integer number (69654123744).

Almost surely, 2^139308247487 is an apocalyptic number.

139308247487 is a deficient number, since it is larger than the sum of its proper divisors (1).

139308247487 is an equidigital number, since it uses as much as digits as its factorization.

139308247487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 139308247487 in words is "one hundred thirty-nine billion, three hundred eight million, two hundred forty-seven thousand, four hundred eighty-seven".