72709253 has 2 divisors, whose sum is σ = 72709254. Its totient is φ = 72709252.

The previous prime is 72709249. The next prime is 72709261. The reversal of 72709253 is 35290727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38217124 + 34492129 = 6182^2 + 5873^2 .

It is an emirp because it is prime and its reverse (35290727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72709253 - 2² = 72709249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72709223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36354626 + 36354627.

It is an arithmetic number, because the mean of its divisors is an integer number (36354627).

Almost surely, 2^72709253 is an apocalyptic number.

It is an amenable number.

72709253 is a deficient number, since it is larger than the sum of its proper divisors (1).

72709253 is an equidigital number, since it uses as much as digits as its factorization.

72709253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 72709253 is about 8526.9720886139. The cubic root of 72709253 is about 417.3783273396.

The spelling of 72709253 in words is "seventy-two million, seven hundred nine thousand, two hundred fifty-three".