72069947 has 8 divisors (see below), whose sum is σ = 74496000. Its totient is φ = 69650280.

The previous prime is 72069937. The next prime is 72069967. The reversal of 72069947 is 74996027.

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 72069947 - 2¹⁴ = 72053563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72069898 and 72069907.

It is not an unprimeable number, because it can be changed into a prime (72069917) 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, 35054 + ... + 37052.

It is an arithmetic number, because the mean of its divisors is an integer number (9312000).

Almost surely, 2^72069947 is an apocalyptic number.

72069947 is a deficient number, since it is larger than the sum of its proper divisors (2426053).

72069947 is a wasteful number, since it uses less digits than its factorization.

72069947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3193.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 72069947 is about 8489.4020401911. The cubic root of 72069947 is about 416.1514391779.

The spelling of 72069947 in words is "seventy-two million, sixty-nine thousand, nine hundred forty-seven".