136772021 has 8 divisors (see below), whose sum is σ = 147899520. Its totient is φ = 125987008.

The previous prime is 136772003. The next prime is 136772029. The reversal of 136772021 is 120277631.

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 136772021 - 2¹⁴ = 136755637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136772029) 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, 84791 + ... + 86388.

It is an arithmetic number, because the mean of its divisors is an integer number (18487440).

Almost surely, 2^136772021 is an apocalyptic number.

It is an amenable number.

136772021 is a deficient number, since it is larger than the sum of its proper divisors (11127499).

136772021 is a wasteful number, since it uses less digits than its factorization.

136772021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171243.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 136772021 is about 11694.9570755946. The cubic root of 136772021 is about 515.2275627369.

The spelling of 136772021 in words is "one hundred thirty-six million, seven hundred seventy-two thousand, twenty-one".