72705403 has 2 divisors, whose sum is σ = 72705404. Its totient is φ = 72705402.

The previous prime is 72705401. The next prime is 72705449. The reversal of 72705403 is 30450727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72705403 - 2¹ = 72705401 is a prime.

Together with 72705401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72705401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36352701 + 36352702.

It is an arithmetic number, because the mean of its divisors is an integer number (36352702).

Almost surely, 2^72705403 is an apocalyptic number.

72705403 is a deficient number, since it is larger than the sum of its proper divisors (1).

72705403 is an equidigital number, since it uses as much as digits as its factorization.

72705403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 72705403 is about 8526.7463313975. The cubic root of 72705403 is about 417.3709603958.

The spelling of 72705403 in words is "seventy-two million, seven hundred five thousand, four hundred three".