72708553 has 2 divisors, whose sum is σ = 72708554. Its totient is φ = 72708552.

The previous prime is 72708551. The next prime is 72708557. The reversal of 72708553 is 35580727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51151104 + 21557449 = 7152^2 + 4643^2 .

It is a cyclic number.

It is not a de Polignac number, because 72708553 - 2¹ = 72708551 is a prime.

Together with 72708551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72708551) 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, 36354276 + 36354277.

It is an arithmetic number, because the mean of its divisors is an integer number (36354277).

Almost surely, 2^72708553 is an apocalyptic number.

It is an amenable number.

72708553 is a deficient number, since it is larger than the sum of its proper divisors (1).

72708553 is an equidigital number, since it uses as much as digits as its factorization.

72708553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 72708553 is about 8526.9310422918. The cubic root of 72708553 is about 417.3769879146.

The spelling of 72708553 in words is "seventy-two million, seven hundred eight thousand, five hundred fifty-three".