897809471 has 8 divisors (see below), whose sum is σ = 967144080. Its totient is φ = 828513792.

The previous prime is 897809459. The next prime is 897809533. The reversal of 897809471 is 174908798.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897809471 is a prime.

It is a super-3 number, since 3×897809471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897809411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53360 + ... + 68138.

It is an arithmetic number, because the mean of its divisors is an integer number (120893010).

Almost surely, 2^897809471 is an apocalyptic number.

897809471 is a deficient number, since it is larger than the sum of its proper divisors (69334609).

897809471 is a wasteful number, since it uses less digits than its factorization.

897809471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19465.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 897809471 is about 29963.4689413626. The cubic root of 897809471 is about 964.7054399094.

The spelling of 897809471 in words is "eight hundred ninety-seven million, eight hundred nine thousand, four hundred seventy-one".