71248637 has 2 divisors, whose sum is σ = 71248638. Its totient is φ = 71248636.

The previous prime is 71248607. The next prime is 71248691. The reversal of 71248637 is 73684217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 116281 = 8434^2 + 341^2 .

It is a cyclic number.

It is not a de Polignac number, because 71248637 - 2¹⁴ = 71232253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71248637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71248607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35624318 + 35624319.

It is an arithmetic number, because the mean of its divisors is an integer number (35624319).

Almost surely, 2^71248637 is an apocalyptic number.

It is an amenable number.

71248637 is a deficient number, since it is larger than the sum of its proper divisors (1).

71248637 is an equidigital number, since it uses as much as digits as its factorization.

71248637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 38.

The square root of 71248637 is about 8440.8907705289. The cubic root of 71248637 is about 414.5645735429.

The spelling of 71248637 in words is "seventy-one million, two hundred forty-eight thousand, six hundred thirty-seven".