139671007 has 4 divisors (see below), whose sum is σ = 159624016. Its totient is φ = 119718000.

The previous prime is 139671001. The next prime is 139671017. The reversal of 139671007 is 700176931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700176931 = 313 ⋅2236987.

It is a cyclic number.

It is not a de Polignac number, because 139671007 - 2¹⁹ = 139146719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139671001) 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, 9976494 + ... + 9976507.

It is an arithmetic number, because the mean of its divisors is an integer number (39906004).

Almost surely, 2^139671007 is an apocalyptic number.

139671007 is a deficient number, since it is larger than the sum of its proper divisors (19953009).

139671007 is an equidigital number, since it uses as much as digits as its factorization.

139671007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19953008.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 139671007 is about 11818.2488973621. The cubic root of 139671007 is about 518.8423544477.

The spelling of 139671007 in words is "one hundred thirty-nine million, six hundred seventy-one thousand, seven".