85291951 has 2 divisors, whose sum is σ = 85291952. Its totient is φ = 85291950.

The previous prime is 85291949. The next prime is 85291957. The reversal of 85291951 is 15919258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85291951 - 2¹ = 85291949 is a prime.

Together with 85291949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85291957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42645975 + 42645976.

It is an arithmetic number, because the mean of its divisors is an integer number (42645976).

Almost surely, 2^85291951 is an apocalyptic number.

85291951 is a deficient number, since it is larger than the sum of its proper divisors (1).

85291951 is an equidigital number, since it uses as much as digits as its factorization.

85291951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 40.

The square root of 85291951 is about 9235.3641509147. The cubic root of 85291951 is about 440.1857875880.

The spelling of 85291951 in words is "eighty-five million, two hundred ninety-one thousand, nine hundred fifty-one".