897391490 has 16 divisors (see below), whose sum is σ = 1626004800. Its totient is φ = 356578800.

The previous prime is 897391423. The next prime is 897391493. The reversal of 897391490 is 94193798.

It is a super-2 number, since 2×897391490² = 1610622972648840200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (897391493) 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, 295640 + ... + 298659.

It is an arithmetic number, because the mean of its divisors is an integer number (101625300).

Almost surely, 2^897391490 is an apocalyptic number.

897391490 is a deficient number, since it is larger than the sum of its proper divisors (728613310).

897391490 is a wasteful number, since it uses less digits than its factorization.

897391490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594457.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 897391490 is about 29956.4932860974. The cubic root of 897391490 is about 964.5557083874. Note that the first 3 decimals are identical.

The spelling of 897391490 in words is "eight hundred ninety-seven million, three hundred ninety-one thousand, four hundred ninety".