139497235 has 4 divisors (see below), whose sum is σ = 167396688. Its totient is φ = 111597784.

The previous prime is 139497199. The next prime is 139497247. The reversal of 139497235 is 532794931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139497235 - 2⁹ = 139496723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139497191 and 139497200.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 13949719 + ... + 13949728.

It is an arithmetic number, because the mean of its divisors is an integer number (41849172).

Almost surely, 2^139497235 is an apocalyptic number.

139497235 is a deficient number, since it is larger than the sum of its proper divisors (27899453).

139497235 is an equidigital number, since it uses as much as digits as its factorization.

139497235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27899452.

The product of its digits is 204120, while the sum is 43.

The square root of 139497235 is about 11810.8947586540. The cubic root of 139497235 is about 518.6270921862.

The spelling of 139497235 in words is "one hundred thirty-nine million, four hundred ninety-seven thousand, two hundred thirty-five".