139148777 has 4 divisors (see below), whose sum is σ = 140499840. Its totient is φ = 137797716.

The previous prime is 139148773. The next prime is 139148813. The reversal of 139148777 is 777841931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139148777 - 2² = 139148773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139148773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675377 + ... + 675582.

It is an arithmetic number, because the mean of its divisors is an integer number (35124960).

Almost surely, 2^139148777 is an apocalyptic number.

It is an amenable number.

139148777 is a deficient number, since it is larger than the sum of its proper divisors (1351063).

139148777 is a wasteful number, since it uses less digits than its factorization.

139148777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351062.

The product of its digits is 296352, while the sum is 47.

The square root of 139148777 is about 11796.1339853360. The cubic root of 139148777 is about 518.1948961761.

The spelling of 139148777 in words is "one hundred thirty-nine million, one hundred forty-eight thousand, seven hundred seventy-seven".