72046639 has 8 divisors (see below), whose sum is σ = 82833408. Its totient is φ = 61383480.

The previous prime is 72046621. The next prime is 72046661. The reversal of 72046639 is 93664027.

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 72046639 - 2⁵ = 72046607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72046598 and 72046607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72046699) 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, 29647 + ... + 31984.

It is an arithmetic number, because the mean of its divisors is an integer number (10354176).

Almost surely, 2^72046639 is an apocalyptic number.

72046639 is a deficient number, since it is larger than the sum of its proper divisors (10786769).

72046639 is a wasteful number, since it uses less digits than its factorization.

72046639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61805.

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

The square root of 72046639 is about 8488.0291587624. The cubic root of 72046639 is about 416.1065721009.

The spelling of 72046639 in words is "seventy-two million, forty-six thousand, six hundred thirty-nine".