87121196623 has 2 divisors, whose sum is σ = 87121196624. Its totient is φ = 87121196622.

The previous prime is 87121196579. The next prime is 87121196671. The reversal of 87121196623 is 32669112178.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87121196623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87121196023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43560598311 + 43560598312.

It is an arithmetic number, because the mean of its divisors is an integer number (43560598312).

Almost surely, 2^87121196623 is an apocalyptic number.

87121196623 is a deficient number, since it is larger than the sum of its proper divisors (1).

87121196623 is an equidigital number, since it uses as much as digits as its factorization.

87121196623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The spelling of 87121196623 in words is "eighty-seven billion, one hundred twenty-one million, one hundred ninety-six thousand, six hundred twenty-three".