72049447 has 2 divisors, whose sum is σ = 72049448. Its totient is φ = 72049446.

The previous prime is 72049441. The next prime is 72049457. The reversal of 72049447 is 74494027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72049447 - 2¹⁹ = 71525159 is a prime.

It is a super-2 number, since 2×72049447² = 10382245626011618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72049441) 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 as a sum of consecutive naturals, namely, 36024723 + 36024724.

It is an arithmetic number, because the mean of its divisors is an integer number (36024724).

Almost surely, 2^72049447 is an apocalyptic number.

72049447 is a deficient number, since it is larger than the sum of its proper divisors (1).

72049447 is an equidigital number, since it uses as much as digits as its factorization.

72049447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 72049447 is about 8488.1945665730. The cubic root of 72049447 is about 416.1119779144. Note that the first 3 decimals are identical.

The spelling of 72049447 in words is "seventy-two million, forty-nine thousand, four hundred forty-seven".