897512505 has 16 divisors (see below), whose sum is σ = 1442188800. Its totient is φ = 476617088.

The previous prime is 897512479. The next prime is 897512507. The reversal of 897512505 is 505215798.

It is a cyclic number.

It is not a de Polignac number, because 897512505 - 2¹³ = 897504313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (897512507) 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 15 ways as a sum of consecutive naturals, for example, 124905 + ... + 131894.

It is an arithmetic number, because the mean of its divisors is an integer number (90136800).

Almost surely, 2^897512505 is an apocalyptic number.

It is an amenable number.

897512505 is a deficient number, since it is larger than the sum of its proper divisors (544676295).

897512505 is a wasteful number, since it uses less digits than its factorization.

897512505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257040.

The product of its (nonzero) digits is 126000, while the sum is 42.

The square root of 897512505 is about 29958.5130639022. The cubic root of 897512505 is about 964.5990638474.

The spelling of 897512505 in words is "eight hundred ninety-seven million, five hundred twelve thousand, five hundred five".