72055603 has 2 divisors, whose sum is σ = 72055604. Its totient is φ = 72055602.

The previous prime is 72055601. The next prime is 72055631. The reversal of 72055603 is 30655027.

It is an a-pointer prime, because the next prime (72055631) can be obtained adding 72055603 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72055603 - 2¹ = 72055601 is a prime.

Together with 72055601, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72055601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36027801 + 36027802.

It is an arithmetic number, because the mean of its divisors is an integer number (36027802).

Almost surely, 2^72055603 is an apocalyptic number.

72055603 is a deficient number, since it is larger than the sum of its proper divisors (1).

72055603 is an equidigital number, since it uses as much as digits as its factorization.

72055603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 72055603 is about 8488.5571801102. The cubic root of 72055603 is about 416.1238286294.

The spelling of 72055603 in words is "seventy-two million, fifty-five thousand, six hundred three".