136873873 has 4 divisors (see below), whose sum is σ = 137064960. Its totient is φ = 136682788.

The previous prime is 136873837. The next prime is 136873921. The reversal of 136873873 is 378378631.

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: 378378631 = 29 ⋅13047539.

It is a cyclic number.

It is not a de Polignac number, because 136873873 - 2²⁵ = 103319441 is a prime.

It is a super-2 number, since 2×136873873² = 37468914220040258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136873073) 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, 94465 + ... + 95902.

It is an arithmetic number, because the mean of its divisors is an integer number (34266240).

Almost surely, 2^136873873 is an apocalyptic number.

It is an amenable number.

136873873 is a deficient number, since it is larger than the sum of its proper divisors (191087).

136873873 is an equidigital number, since it uses as much as digits as its factorization.

136873873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191086.

The product of its digits is 508032, while the sum is 46.

The square root of 136873873 is about 11699.3107916663. The cubic root of 136873873 is about 515.3554249914.

The spelling of 136873873 in words is "one hundred thirty-six million, eight hundred seventy-three thousand, eight hundred seventy-three".