72543407 has 2 divisors, whose sum is σ = 72543408. Its totient is φ = 72543406.

The previous prime is 72543397. The next prime is 72543439. The reversal of 72543407 is 70434527.

It is an a-pointer prime, because the next prime (72543439) can be obtained adding 72543407 to its sum of digits (32).

It is a weak prime.

It is an emirp because it is prime and its reverse (70434527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72543407 - 2²² = 68349103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72543467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36271703 + 36271704.

It is an arithmetic number, because the mean of its divisors is an integer number (36271704).

Almost surely, 2^72543407 is an apocalyptic number.

72543407 is a deficient number, since it is larger than the sum of its proper divisors (1).

72543407 is an equidigital number, since it uses as much as digits as its factorization.

72543407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 72543407 is about 8517.2417483596. The cubic root of 72543407 is about 417.0607463831.

The spelling of 72543407 in words is "seventy-two million, five hundred forty-three thousand, four hundred seven".