136701921 has 4 divisors (see below), whose sum is σ = 182269232. Its totient is φ = 91134612.

The previous prime is 136701919. The next prime is 136701923. The reversal of 136701921 is 129107631.

136701921 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.

It is an interprime number because it is at equal distance from previous prime (136701919) and next prime (136701923).

It is not a de Polignac number, because 136701921 - 2¹ = 136701919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136701923) 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, 22783651 + ... + 22783656.

It is an arithmetic number, because the mean of its divisors is an integer number (45567308).

Almost surely, 2^136701921 is an apocalyptic number.

It is an amenable number.

136701921 is a deficient number, since it is larger than the sum of its proper divisors (45567311).

136701921 is an equidigital number, since it uses as much as digits as its factorization.

136701921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45567310.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 136701921 is about 11691.9596732113. The cubic root of 136701921 is about 515.1395242037.

The spelling of 136701921 in words is "one hundred thirty-six million, seven hundred one thousand, nine hundred twenty-one".