139266977 has 4 divisors (see below), whose sum is σ = 139290816. Its totient is φ = 139243140.

The previous prime is 139266943. The next prime is 139267003. The reversal of 139266977 is 779662931.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 139266977 - 2⁶ = 139266913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139266917) by changing a digit.

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, 3452 + ... + 17042.

It is an arithmetic number, because the mean of its divisors is an integer number (34822704).

Almost surely, 2^139266977 is an apocalyptic number.

It is an amenable number.

139266977 is a deficient number, since it is larger than the sum of its proper divisors (23839).

139266977 is a wasteful number, since it uses less digits than its factorization.

139266977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23838.

The product of its digits is 857304, while the sum is 50.

The square root of 139266977 is about 11801.1430378587. The cubic root of 139266977 is about 518.3415816234.

The spelling of 139266977 in words is "one hundred thirty-nine million, two hundred sixty-six thousand, nine hundred seventy-seven".