71554643 has 2 divisors, whose sum is σ = 71554644. Its totient is φ = 71554642.

The previous prime is 71554631. The next prime is 71554663. The reversal of 71554643 is 34645517.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71554643 - 2⁸ = 71554387 is a prime.

It is not a weakly prime, because it can be changed into another prime (71554663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35777321 + 35777322.

It is an arithmetic number, because the mean of its divisors is an integer number (35777322).

Almost surely, 2^71554643 is an apocalyptic number.

71554643 is a deficient number, since it is larger than the sum of its proper divisors (1).

71554643 is an equidigital number, since it uses as much as digits as its factorization.

71554643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 35.

The square root of 71554643 is about 8458.9977538713. The cubic root of 71554643 is about 415.1572307888.

The spelling of 71554643 in words is "seventy-one million, five hundred fifty-four thousand, six hundred forty-three".