139378435 has 16 divisors (see below), whose sum is σ = 191480832. Its totient is φ = 95407200.

The previous prime is 139378429. The next prime is 139378439. The reversal of 139378435 is 534873931.

It is a happy number.

139378435 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139378435 - 2⁵ = 139378403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139378391 and 139378400.

It is not an unprimeable number, because it can be changed into a prime (139378439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18930 + ... + 25240.

It is an arithmetic number, because the mean of its divisors is an integer number (11967552).

Almost surely, 2^139378435 is an apocalyptic number.

139378435 is a deficient number, since it is larger than the sum of its proper divisors (52102397).

139378435 is an equidigital number, since it uses as much as digits as its factorization.

139378435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6954.

The product of its digits is 272160, while the sum is 43.

The square root of 139378435 is about 11805.8644325606. The cubic root of 139378435 is about 518.4798242796.

The spelling of 139378435 in words is "one hundred thirty-nine million, three hundred seventy-eight thousand, four hundred thirty-five".