85758909947 has 2 divisors, whose sum is σ = 85758909948. Its totient is φ = 85758909946.

The previous prime is 85758909871. The next prime is 85758909959. The reversal of 85758909947 is 74990985758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85758909947 - 2¹² = 85758905851 is a prime.

It is not a weakly prime, because it can be changed into another prime (85758909967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42879454973 + 42879454974.

It is an arithmetic number, because the mean of its divisors is an integer number (42879454974).

Almost surely, 2^85758909947 is an apocalyptic number.

85758909947 is a deficient number, since it is larger than the sum of its proper divisors (1).

85758909947 is an equidigital number, since it uses as much as digits as its factorization.

85758909947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 228614400, while the sum is 71.

The spelling of 85758909947 in words is "eighty-five billion, seven hundred fifty-eight million, nine hundred nine thousand, nine hundred forty-seven".