136722439 has 8 divisors (see below), whose sum is σ = 156338208. Its totient is φ = 117127680.

The previous prime is 136722403. The next prime is 136722451. The reversal of 136722439 is 934227631.

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

It is a cyclic number.

It is not a de Polignac number, because 136722439 - 2¹¹ = 136720391 is a prime.

It is a super-2 number, since 2×136722439² = 37386050652217442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136722398 and 136722407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136722479) 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, 12879 + ... + 20959.

It is an arithmetic number, because the mean of its divisors is an integer number (19542276).

Almost surely, 2^136722439 is an apocalyptic number.

136722439 is a deficient number, since it is larger than the sum of its proper divisors (19615769).

136722439 is an equidigital number, since it uses as much as digits as its factorization.

136722439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505.

The product of its digits is 54432, while the sum is 37.

The square root of 136722439 is about 11692.8370808799. The cubic root of 136722439 is about 515.1652958581.

The spelling of 136722439 in words is "one hundred thirty-six million, seven hundred twenty-two thousand, four hundred thirty-nine".