136722381 has 8 divisors (see below), whose sum is σ = 193019904. Its totient is φ = 85786560.

The previous prime is 136722379. The next prime is 136722403. The reversal of 136722381 is 183227631.

136722381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136722381 - 2¹ = 136722379 is a prime.

It is a super-2 number, since 2×136722381² = 37386018932618322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136722371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340365 + ... + 1340466.

It is an arithmetic number, because the mean of its divisors is an integer number (24127488).

Almost surely, 2^136722381 is an apocalyptic number.

It is an amenable number.

136722381 is a deficient number, since it is larger than the sum of its proper divisors (56297523).

136722381 is a wasteful number, since it uses less digits than its factorization.

136722381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680851.

The product of its digits is 12096, while the sum is 33.

The square root of 136722381 is about 11692.8346007288. The cubic root of 136722381 is about 515.1652230108.

The spelling of 136722381 in words is "one hundred thirty-six million, seven hundred twenty-two thousand, three hundred eighty-one".