71253653 has 2 divisors, whose sum is σ = 71253654. Its totient is φ = 71253652.

The previous prime is 71253631. The next prime is 71253659. The reversal of 71253653 is 35635217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66618244 + 4635409 = 8162^2 + 2153^2 .

It is an emirp because it is prime and its reverse (35635217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71253653 - 2⁸ = 71253397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71253659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35626826 + 35626827.

It is an arithmetic number, because the mean of its divisors is an integer number (35626827).

Almost surely, 2^71253653 is an apocalyptic number.

It is an amenable number.

71253653 is a deficient number, since it is larger than the sum of its proper divisors (1).

71253653 is an equidigital number, since it uses as much as digits as its factorization.

71253653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 32.

The square root of 71253653 is about 8441.1878903387. The cubic root of 71253653 is about 414.5743019494.

The spelling of 71253653 in words is "seventy-one million, two hundred fifty-three thousand, six hundred fifty-three".