87042620671 has 2 divisors, whose sum is σ = 87042620672. Its totient is φ = 87042620670.

The previous prime is 87042620629. The next prime is 87042620681. The reversal of 87042620671 is 17602624078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87042620671 - 2²¹ = 87040523519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87042620681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43521310335 + 43521310336.

It is an arithmetic number, because the mean of its divisors is an integer number (43521310336).

Almost surely, 2^87042620671 is an apocalyptic number.

87042620671 is a deficient number, since it is larger than the sum of its proper divisors (1).

87042620671 is an equidigital number, since it uses as much as digits as its factorization.

87042620671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 87042620671 in words is "eighty-seven billion, forty-two million, six hundred twenty thousand, six hundred seventy-one".