139496887 has 2 divisors, whose sum is σ = 139496888. Its totient is φ = 139496886.

The previous prime is 139496843. The next prime is 139496899. The reversal of 139496887 is 788694931.

It is a strong prime.

It is an emirp because it is prime and its reverse (788694931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139496887 - 2⁷ = 139496759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139496837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69748443 + 69748444.

It is an arithmetic number, because the mean of its divisors is an integer number (69748444).

Almost surely, 2^139496887 is an apocalyptic number.

139496887 is a deficient number, since it is larger than the sum of its proper divisors (1).

139496887 is an equidigital number, since it uses as much as digits as its factorization.

139496887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 139496887 is about 11810.8800264841. The cubic root of 139496887 is about 518.6266609174.

The spelling of 139496887 in words is "one hundred thirty-nine million, four hundred ninety-six thousand, eight hundred eighty-seven".