87293658643 has 2 divisors, whose sum is σ = 87293658644. Its totient is φ = 87293658642.

The previous prime is 87293658637. The next prime is 87293658677. The reversal of 87293658643 is 34685639278.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87293658643 is a prime.

It is not a weakly prime, because it can be changed into another prime (87293658443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43646829321 + 43646829322.

It is an arithmetic number, because the mean of its divisors is an integer number (43646829322).

Almost surely, 2^87293658643 is an apocalyptic number.

87293658643 is a deficient number, since it is larger than the sum of its proper divisors (1).

87293658643 is an equidigital number, since it uses as much as digits as its factorization.

87293658643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 61.

The spelling of 87293658643 in words is "eighty-seven billion, two hundred ninety-three million, six hundred fifty-eight thousand, six hundred forty-three".