85290291 has 24 divisors (see below), whose sum is σ = 129633504. Its totient is φ = 53965440.

The previous prime is 85290229. The next prime is 85290299. The reversal of 85290291 is 19209258.

85290291 is a `hidden beast` number, since 85 + 290 + 291 = 666.

It is not a de Polignac number, because 85290291 - 2¹⁴ = 85273907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85290299) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10530 + ... + 16776.

It is an arithmetic number, because the mean of its divisors is an integer number (5401396).

Almost surely, 2^85290291 is an apocalyptic number.

85290291 is a deficient number, since it is larger than the sum of its proper divisors (44343213).

85290291 is a wasteful number, since it uses less digits than its factorization.

85290291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6331 (or 6328 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 85290291 is about 9235.2742785474. The cubic root of 85290291 is about 440.1829318549.

The spelling of 85290291 in words is "eighty-five million, two hundred ninety thousand, two hundred ninety-one".