897861667 has 4 divisors (see below), whose sum is σ = 906099040. Its totient is φ = 889624296.

The previous prime is 897861661. The next prime is 897861689. The reversal of 897861667 is 766168798.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 897861667 - 2³ = 897861659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897861661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4118523 + ... + 4118740.

It is an arithmetic number, because the mean of its divisors is an integer number (226524760).

Almost surely, 2^897861667 is an apocalyptic number.

897861667 is a deficient number, since it is larger than the sum of its proper divisors (8237373).

897861667 is a wasteful number, since it uses less digits than its factorization.

897861667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8237372.

The product of its digits is 6096384, while the sum is 58.

The square root of 897861667 is about 29964.3399226481. The cubic root of 897861667 is about 964.7241345921.

The spelling of 897861667 in words is "eight hundred ninety-seven million, eight hundred sixty-one thousand, six hundred sixty-seven".