85420297 has 4 divisors (see below), whose sum is σ = 85474116. Its totient is φ = 85366480.

The previous prime is 85420289. The next prime is 85420303. The reversal of 85420297 is 79202458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5067001 + 80353296 = 2251^2 + 8964^2 .

It is a cyclic number.

It is not a de Polignac number, because 85420297 - 2³ = 85420289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85420217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24454 + ... + 27727.

It is an arithmetic number, because the mean of its divisors is an integer number (21368529).

Almost surely, 2^85420297 is an apocalyptic number.

It is an amenable number.

85420297 is a deficient number, since it is larger than the sum of its proper divisors (53819).

85420297 is a wasteful number, since it uses less digits than its factorization.

85420297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53818.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 85420297 is about 9242.3101549342. The cubic root of 85420297 is about 440.4064718376.

The spelling of 85420297 in words is "eighty-five million, four hundred twenty thousand, two hundred ninety-seven".