72001659 has 8 divisors (see below), whose sum is σ = 101055040. Its totient is φ = 45474696.

The previous prime is 72001649. The next prime is 72001663. The reversal of 72001659 is 95610027.

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

It is not a de Polignac number, because 72001659 - 2²³ = 63613051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72001639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631537 + ... + 631650.

It is an arithmetic number, because the mean of its divisors is an integer number (12631880).

Almost surely, 2^72001659 is an apocalyptic number.

72001659 is a deficient number, since it is larger than the sum of its proper divisors (29053381).

72001659 is a wasteful number, since it uses less digits than its factorization.

72001659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263209.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 72001659 is about 8485.3791311880. The cubic root of 72001659 is about 416.0199598257.

The spelling of 72001659 in words is "seventy-two million, one thousand, six hundred fifty-nine".