897551081 has 8 divisors (see below), whose sum is σ = 1046707200. Its totient is φ = 769329204.

The previous prime is 897551077. The next prime is 897551087. The reversal of 897551081 is 180155798.

It is a happy number.

It is not a de Polignac number, because 897551081 - 2² = 897551077 is a prime.

It is a super-2 number, since 2×897551081² = 1611195886008537122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (897551087) 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 7 ways as a sum of consecutive naturals, for example, 1308041 + ... + 1308726.

It is an arithmetic number, because the mean of its divisors is an integer number (130838400).

Almost surely, 2^897551081 is an apocalyptic number.

It is an amenable number.

897551081 is a deficient number, since it is larger than the sum of its proper divisors (149156119).

897551081 is an equidigital number, since it uses as much as digits as its factorization.

897551081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616788 (or 2616774 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 44.

The square root of 897551081 is about 29959.1568806600. The cubic root of 897551081 is about 964.6128834655.

The spelling of 897551081 in words is "eight hundred ninety-seven million, five hundred fifty-one thousand, eighty-one".