139378563 has 40 divisors (see below), whose sum is σ = 222469632. Its totient is φ = 86655744.

The previous prime is 139378541. The next prime is 139378601. The reversal of 139378563 is 365873931.

139378563 is a `hidden beast` number, since 13 + 9 + 3 + 78 + 563 = 666.

It is not a de Polignac number, because 139378563 - 2⁵ = 139378531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139370563) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 174481 + ... + 175277.

Almost surely, 2^139378563 is an apocalyptic number.

139378563 is a deficient number, since it is larger than the sum of its proper divisors (83091069).

139378563 is a wasteful number, since it uses less digits than its factorization.

139378563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953 (or 944 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 139378563 is about 11805.8698535940. The cubic root of 139378563 is about 518.4799829972.

It can be divided in two parts, 13937 and 8563, that added together give a square (22500 = 150²).

The spelling of 139378563 in words is "one hundred thirty-nine million, three hundred seventy-eight thousand, five hundred sixty-three".