85620897 has 30 divisors (see below), whose sum is σ = 132333682. Its totient is φ = 53335584.

The previous prime is 85620893. The next prime is 85620901. The reversal of 85620897 is 79802658.

85620897 is a `hidden beast` number, since 8 + 562 + 0 + 89 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (85620893) and next prime (85620901).

It can be written as a sum of positive squares in only one way, i.e., 75064896 + 10556001 = 8664^2 + 3249^2 .

It is not a de Polignac number, because 85620897 - 2² = 85620893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85620893) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1172853 + ... + 1172925.

Almost surely, 2^85620897 is an apocalyptic number.

It is an amenable number.

85620897 is a deficient number, since it is larger than the sum of its proper divisors (46712785).

85620897 is an frugal number, since it uses more digits than its factorization.

85620897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 85620897 is about 9253.1560561789. The cubic root of 85620897 is about 440.7509507453.

The spelling of 85620897 in words is "eighty-five million, six hundred twenty thousand, eight hundred ninety-seven".