72949247 has 8 divisors (see below), whose sum is σ = 83521152. Its totient is φ = 62415000.

The previous prime is 72949243. The next prime is 72949259. The reversal of 72949247 is 74294927.

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 72949247 - 2² = 72949243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72949198 and 72949207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72949243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129 + ... + 13122.

It is an arithmetic number, because the mean of its divisors is an integer number (10440144).

Almost surely, 2^72949247 is an apocalyptic number.

72949247 is a deficient number, since it is larger than the sum of its proper divisors (10571905).

72949247 is a wasteful number, since it uses less digits than its factorization.

72949247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18829.

The product of its digits is 254016, while the sum is 44.

The square root of 72949247 is about 8541.0331342291. The cubic root of 72949247 is about 417.8370414745.

The spelling of 72949247 in words is "seventy-two million, nine hundred forty-nine thousand, two hundred forty-seven".