139619593 has 2 divisors, whose sum is σ = 139619594. Its totient is φ = 139619592.

The previous prime is 139619587. The next prime is 139619617. The reversal of 139619593 is 395916931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138603529 + 1016064 = 11773^2 + 1008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139619593 is a prime.

It is equal to p_7891849 and since 139619593 and 7891849 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (139619533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69809796 + 69809797.

It is an arithmetic number, because the mean of its divisors is an integer number (69809797).

Almost surely, 2^139619593 is an apocalyptic number.

It is an amenable number.

139619593 is a deficient number, since it is larger than the sum of its proper divisors (1).

139619593 is an equidigital number, since it uses as much as digits as its factorization.

139619593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196830, while the sum is 46.

The square root of 139619593 is about 11816.0735018025. The cubic root of 139619593 is about 518.7786833126.

The spelling of 139619593 in words is "one hundred thirty-nine million, six hundred nineteen thousand, five hundred ninety-three".