897202691 has 12 divisors (see below), whose sum is σ = 1138565880. Its totient is φ = 699118560.

The previous prime is 897202679. The next prime is 897202721. The reversal of 897202691 is 196202798.

It is a happy number.

897202691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 897202691 - 2⁶ = 897202627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897204691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 831746 + ... + 832823.

It is an arithmetic number, because the mean of its divisors is an integer number (94880490).

Almost surely, 2^897202691 is an apocalyptic number.

897202691 is a deficient number, since it is larger than the sum of its proper divisors (241363189).

897202691 is a wasteful number, since it uses less digits than its factorization.

897202691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664594 (or 1664587 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 897202691 is about 29953.3419003623. The cubic root of 897202691 is about 964.4880604962.

The spelling of 897202691 in words is "eight hundred ninety-seven million, two hundred two thousand, six hundred ninety-one".