897209239 has 2 divisors, whose sum is σ = 897209240. Its totient is φ = 897209238.

The previous prime is 897209237. The next prime is 897209251. The reversal of 897209239 is 932902798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 897209239 - 2¹ = 897209237 is a prime.

Together with 897209237, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 897209192 and 897209201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897209237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448604619 + 448604620.

It is an arithmetic number, because the mean of its divisors is an integer number (448604620).

Almost surely, 2^897209239 is an apocalyptic number.

897209239 is a deficient number, since it is larger than the sum of its proper divisors (1).

897209239 is an equidigital number, since it uses as much as digits as its factorization.

897209239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 897209239 is about 29953.4512034924. The cubic root of 897209239 is about 964.4904068454.

The spelling of 897209239 in words is "eight hundred ninety-seven million, two hundred nine thousand, two hundred thirty-nine".