71387807503 has 2 divisors, whose sum is σ = 71387807504. Its totient is φ = 71387807502.

The previous prime is 71387807479. The next prime is 71387807539. The reversal of 71387807503 is 30570878317.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71387807503 - 2¹⁷ = 71387676431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71387807203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35693903751 + 35693903752.

It is an arithmetic number, because the mean of its divisors is an integer number (35693903752).

Almost surely, 2^71387807503 is an apocalyptic number.

71387807503 is a deficient number, since it is larger than the sum of its proper divisors (1).

71387807503 is an equidigital number, since it uses as much as digits as its factorization.

71387807503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 987840, while the sum is 49.

The spelling of 71387807503 in words is "seventy-one billion, three hundred eighty-seven million, eight hundred seven thousand, five hundred three".