72252709 has 2 divisors, whose sum is σ = 72252710. Its totient is φ = 72252708.

The previous prime is 72252707. The next prime is 72252773. The reversal of 72252709 is 90725227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68062500 + 4190209 = 8250^2 + 2047^2 .

It is a cyclic number.

It is not a de Polignac number, because 72252709 - 2¹ = 72252707 is a prime.

Together with 72252707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72252707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36126354 + 36126355.

It is an arithmetic number, because the mean of its divisors is an integer number (36126355).

Almost surely, 2^72252709 is an apocalyptic number.

It is an amenable number.

72252709 is a deficient number, since it is larger than the sum of its proper divisors (1).

72252709 is an equidigital number, since it uses as much as digits as its factorization.

72252709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 72252709 is about 8500.1593514475. The cubic root of 72252709 is about 416.5029147109.

The spelling of 72252709 in words is "seventy-two million, two hundred fifty-two thousand, seven hundred nine".