72640703 has 2 divisors, whose sum is σ = 72640704. Its totient is φ = 72640702.

The previous prime is 72640661. The next prime is 72640747. The reversal of 72640703 is 30704627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72640703 - 2¹⁴ = 72624319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72640753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36320351 + 36320352.

It is an arithmetic number, because the mean of its divisors is an integer number (36320352).

Almost surely, 2^72640703 is an apocalyptic number.

72640703 is a deficient number, since it is larger than the sum of its proper divisors (1).

72640703 is an equidigital number, since it uses as much as digits as its factorization.

72640703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 72640703 is about 8522.9515427462. The cubic root of 72640703 is about 417.2471185438.

The spelling of 72640703 in words is "seventy-two million, six hundred forty thousand, seven hundred three".