897078907 has 4 divisors (see below), whose sum is σ = 898440840. Its totient is φ = 895716976.

The previous prime is 897078841. The next prime is 897078911. The reversal of 897078907 is 709870798.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897078907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897078937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679978 + ... + 681295.

It is an arithmetic number, because the mean of its divisors is an integer number (224610210).

Almost surely, 2^897078907 is an apocalyptic number.

897078907 is a deficient number, since it is larger than the sum of its proper divisors (1361933).

897078907 is a wasteful number, since it uses less digits than its factorization.

897078907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361932.

The product of its (nonzero) digits is 1778112, while the sum is 55.

The square root of 897078907 is about 29951.2755487976. The cubic root of 897078907 is about 964.4437027450.

The spelling of 897078907 in words is "eight hundred ninety-seven million, seventy-eight thousand, nine hundred seven".