72011687 has 8 divisors (see below), whose sum is σ = 79337232. Its totient is φ = 64816000.

The previous prime is 72011633. The next prime is 72011699. The reversal of 72011687 is 78611027.

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 72011687 - 2⁸ = 72011431 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 (72011087) 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, 31298 + ... + 33519.

It is an arithmetic number, because the mean of its divisors is an integer number (9917154).

Almost surely, 2^72011687 is an apocalyptic number.

72011687 is a deficient number, since it is larger than the sum of its proper divisors (7325545).

72011687 is a wasteful number, since it uses less digits than its factorization.

72011687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64929.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 72011687 is about 8485.9700093743. The cubic root of 72011687 is about 416.0392725960.

It can be divided in two parts, 7201 and 1687, that added together give a palindrome (8888).

The spelling of 72011687 in words is "seventy-two million, eleven thousand, six hundred eighty-seven".