85316097421 has 2 divisors, whose sum is σ = 85316097422. Its totient is φ = 85316097420.

The previous prime is 85316097413. The next prime is 85316097431. The reversal of 85316097421 is 12479061358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71371794025 + 13944303396 = 267155^2 + 118086^2 .

It is a cyclic number.

It is not a de Polignac number, because 85316097421 - 2³ = 85316097413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85316097431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42658048710 + 42658048711.

It is an arithmetic number, because the mean of its divisors is an integer number (42658048711).

It is a 1-persistent number, because it is pandigital, but 2⋅85316097421 = 170632194842 is not.

Almost surely, 2^85316097421 is an apocalyptic number.

It is an amenable number.

85316097421 is a deficient number, since it is larger than the sum of its proper divisors (1).

85316097421 is an equidigital number, since it uses as much as digits as its factorization.

85316097421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 85316097421 in words is "eighty-five billion, three hundred sixteen million, ninety-seven thousand, four hundred twenty-one".