72671709 has 16 divisors (see below), whose sum is σ = 109350720. Its totient is φ = 42524160.

The previous prime is 72671707. The next prime is 72671747. The reversal of 72671709 is 90717627.

It is not a de Polignac number, because 72671709 - 2¹ = 72671707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72671707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37012 + ... + 38925.

It is an arithmetic number, because the mean of its divisors is an integer number (6834420).

Almost surely, 2^72671709 is an apocalyptic number.

It is an amenable number.

72671709 is a deficient number, since it is larger than the sum of its proper divisors (36679011).

72671709 is a wasteful number, since it uses less digits than its factorization.

72671709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75980.

The product of its (nonzero) digits is 37044, while the sum is 39.

The square root of 72671709 is about 8524.7703194866. The cubic root of 72671709 is about 417.3064761002.

The spelling of 72671709 in words is "seventy-two million, six hundred seventy-one thousand, seven hundred nine".