72707903 has 2 divisors, whose sum is σ = 72707904. Its totient is φ = 72707902.

The previous prime is 72707879. The next prime is 72707909. The reversal of 72707903 is 30970727.

It is a strong prime.

It is an emirp because it is prime and its reverse (30970727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72707903 - 2¹⁴ = 72691519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72707909) 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 as a sum of consecutive naturals, namely, 36353951 + 36353952.

It is an arithmetic number, because the mean of its divisors is an integer number (36353952).

Almost surely, 2^72707903 is an apocalyptic number.

72707903 is a deficient number, since it is larger than the sum of its proper divisors (1).

72707903 is an equidigital number, since it uses as much as digits as its factorization.

72707903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18522, while the sum is 35.

The square root of 72707903 is about 8526.8929276730. The cubic root of 72707903 is about 417.3757441551.

The spelling of 72707903 in words is "seventy-two million, seven hundred seven thousand, nine hundred three".