85622952997 has 4 divisors (see below), whose sum is σ = 85623611116. Its totient is φ = 85622294880.

The previous prime is 85622952977. The next prime is 85622953019. The reversal of 85622952997 is 79925922658.

It is a Cunningham number, because it is equal to 292614²+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 83154949956 + 2468003041 = 288366^2 + 49679^2 .

It is a cyclic number.

It is not a de Polignac number, because 85622952997 - 2⁷ = 85622952869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85622952977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61254 + ... + 418327.

It is an arithmetic number, because the mean of its divisors is an integer number (21405902779).

Almost surely, 2^85622952997 is an apocalyptic number.

It is an amenable number.

85622952997 is a deficient number, since it is larger than the sum of its proper divisors (658119).

85622952997 is a wasteful number, since it uses less digits than its factorization.

85622952997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658118.

The product of its digits is 48988800, while the sum is 64.

It can be divided in two parts, 856229 and 52997, that added together give a triangular number (909226 = T₁₃₄₈).

The spelling of 85622952997 in words is "eighty-five billion, six hundred twenty-two million, nine hundred fifty-two thousand, nine hundred ninety-seven".