139343777 has 4 divisors (see below), whose sum is σ = 146677680. Its totient is φ = 132009876.

The previous prime is 139343761. The next prime is 139343801. The reversal of 139343777 is 777343931.

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 139343777 - 2⁴ = 139343761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139343717) 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, 3666923 + ... + 3666960.

It is an arithmetic number, because the mean of its divisors is an integer number (36669420).

Almost surely, 2^139343777 is an apocalyptic number.

It is an amenable number.

139343777 is a deficient number, since it is larger than the sum of its proper divisors (7333903).

139343777 is an equidigital number, since it uses as much as digits as its factorization.

139343777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333902.

The product of its digits is 333396, while the sum is 44.

The square root of 139343777 is about 11804.3965114698. The cubic root of 139343777 is about 518.4368454563.

The spelling of 139343777 in words is "one hundred thirty-nine million, three hundred forty-three thousand, seven hundred seventy-seven".