72389503 has 2 divisors, whose sum is σ = 72389504. Its totient is φ = 72389502.

The previous prime is 72389497. The next prime is 72389531. The reversal of 72389503 is 30598327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72389503 - 2⁹ = 72388991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72389593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36194751 + 36194752.

It is an arithmetic number, because the mean of its divisors is an integer number (36194752).

Almost surely, 2^72389503 is an apocalyptic number.

72389503 is a deficient number, since it is larger than the sum of its proper divisors (1).

72389503 is an equidigital number, since it uses as much as digits as its factorization.

72389503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 72389503 is about 8508.2021015018. The cubic root of 72389503 is about 416.7656000452.

The spelling of 72389503 in words is "seventy-two million, three hundred eighty-nine thousand, five hundred three".