897987427 has 4 divisors (see below), whose sum is σ = 914930640. Its totient is φ = 881044216.

The previous prime is 897987421. The next prime is 897987451. The reversal of 897987427 is 724789798.

897987427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-897987427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897987421) 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, 8471527 + ... + 8471632.

It is an arithmetic number, because the mean of its divisors is an integer number (228732660).

Almost surely, 2^897987427 is an apocalyptic number.

897987427 is a deficient number, since it is larger than the sum of its proper divisors (16943213).

897987427 is a wasteful number, since it uses less digits than its factorization.

897987427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16943212.

The product of its digits is 14224896, while the sum is 61.

The square root of 897987427 is about 29966.4383435870. The cubic root of 897987427 is about 964.7691742114.

The spelling of 897987427 in words is "eight hundred ninety-seven million, nine hundred eighty-seven thousand, four hundred twenty-seven".