85191707 has 2 divisors, whose sum is σ = 85191708. Its totient is φ = 85191706.

The previous prime is 85191679. The next prime is 85191719. The reversal of 85191707 is 70719158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85191707 - 2¹² = 85187611 is a prime.

It is not a weakly prime, because it can be changed into another prime (85191737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42595853 + 42595854.

It is an arithmetic number, because the mean of its divisors is an integer number (42595854).

Almost surely, 2^85191707 is an apocalyptic number.

85191707 is a deficient number, since it is larger than the sum of its proper divisors (1).

85191707 is an equidigital number, since it uses as much as digits as its factorization.

85191707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 85191707 is about 9229.9353735549. The cubic root of 85191707 is about 440.0132692279.

The spelling of 85191707 in words is "eighty-five million, one hundred ninety-one thousand, seven hundred seven".