72123703 has 2 divisors, whose sum is σ = 72123704. Its totient is φ = 72123702.

The previous prime is 72123697. The next prime is 72123757. The reversal of 72123703 is 30732127.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72123703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72153703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36061851 + 36061852.

It is an arithmetic number, because the mean of its divisors is an integer number (36061852).

Almost surely, 2^72123703 is an apocalyptic number.

72123703 is a deficient number, since it is larger than the sum of its proper divisors (1).

72123703 is an equidigital number, since it uses as much as digits as its factorization.

72123703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 72123703 is about 8492.5675151864. The cubic root of 72123703 is about 416.2548807094.

The spelling of 72123703 in words is "seventy-two million, one hundred twenty-three thousand, seven hundred three".