897121078 has 16 divisors (see below), whose sum is σ = 1563989760. Its totient is φ = 377963496.

The previous prime is 897121067. The next prime is 897121091. The reversal of 897121078 is 870121798.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 542226 + ... + 543877.

It is an arithmetic number, because the mean of its divisors is an integer number (97749360).

Almost surely, 2^897121078 is an apocalyptic number.

897121078 is a deficient number, since it is larger than the sum of its proper divisors (666868682).

897121078 is a wasteful number, since it uses less digits than its factorization.

897121078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086171.

The product of its (nonzero) digits is 56448, while the sum is 43.

The square root of 897121078 is about 29951.9795339139. The cubic root of 897121078 is about 964.4588150976.

The spelling of 897121078 in words is "eight hundred ninety-seven million, one hundred twenty-one thousand, seventy-eight".