85723007987 has 2 divisors, whose sum is σ = 85723007988. Its totient is φ = 85723007986.

The previous prime is 85723007869. The next prime is 85723008023. The reversal of 85723007987 is 78970032758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85723007987 - 2³² = 81428040691 is a prime.

It is not a weakly prime, because it can be changed into another prime (85723003987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42861503993 + 42861503994.

It is an arithmetic number, because the mean of its divisors is an integer number (42861503994).

Almost surely, 2^85723007987 is an apocalyptic number.

85723007987 is a deficient number, since it is larger than the sum of its proper divisors (1).

85723007987 is an equidigital number, since it uses as much as digits as its factorization.

85723007987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 85723007987 in words is "eighty-five billion, seven hundred twenty-three million, seven thousand, nine hundred eighty-seven".