897511730 has 16 divisors (see below), whose sum is σ = 1654924824. Its totient is φ = 350248320.

The previous prime is 897511729. The next prime is 897511733. The reversal of 897511730 is 37115798.

It can be written as a sum of positive squares in 4 ways, for example, as 434013889 + 463497841 = 20833^2 + 21529^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (897511733) 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, 1094117 + ... + 1094936.

Almost surely, 2^897511730 is an apocalyptic number.

897511730 is a deficient number, since it is larger than the sum of its proper divisors (757413094).

897511730 is a wasteful number, since it uses less digits than its factorization.

897511730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189101.

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 897511730 is about 29958.5001293456. The cubic root of 897511730 is about 964.5987862043.

The spelling of 897511730 in words is "eight hundred ninety-seven million, five hundred eleven thousand, seven hundred thirty".