139434563 has 4 divisors (see below), whose sum is σ = 142835448. Its totient is φ = 136033680.

The previous prime is 139434553. The next prime is 139434583. The reversal of 139434563 is 365434931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365434931 = 2957 ⋅123583.

It is a cyclic number.

It is not a de Polignac number, because 139434563 - 2¹⁸ = 139172419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139434553) 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 in 3 ways as a sum of consecutive naturals, for example, 1700381 + ... + 1700462.

It is an arithmetic number, because the mean of its divisors is an integer number (35708862).

Almost surely, 2^139434563 is an apocalyptic number.

139434563 is a deficient number, since it is larger than the sum of its proper divisors (3400885).

139434563 is an equidigital number, since it uses as much as digits as its factorization.

139434563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400884.

The product of its digits is 116640, while the sum is 38.

The square root of 139434563 is about 11808.2413169786. The cubic root of 139434563 is about 518.5494125917.

The spelling of 139434563 in words is "one hundred thirty-nine million, four hundred thirty-four thousand, five hundred sixty-three".