139867853 has 4 divisors (see below), whose sum is σ = 145949088. Its totient is φ = 133786620.

The previous prime is 139867843. The next prime is 139867859. The reversal of 139867853 is 358768931.

It is a happy number.

139867853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 358768931 = 373 ⋅961847.

It is a cyclic number.

It is not a de Polignac number, because 139867853 - 2⁴ = 139867837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139867859) 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, 3040583 + ... + 3040628.

It is an arithmetic number, because the mean of its divisors is an integer number (36487272).

Almost surely, 2^139867853 is an apocalyptic number.

It is an amenable number.

139867853 is a deficient number, since it is larger than the sum of its proper divisors (6081235).

139867853 is an equidigital number, since it uses as much as digits as its factorization.

139867853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6081234.

The product of its digits is 1088640, while the sum is 50.

The square root of 139867853 is about 11826.5740178633. The cubic root of 139867853 is about 519.0859843456.

The spelling of 139867853 in words is "one hundred thirty-nine million, eight hundred sixty-seven thousand, eight hundred fifty-three".