245974871 has 2 divisors, whose sum is σ = 245974872. Its totient is φ = 245974870.

The previous prime is 245974843. The next prime is 245974873. The reversal of 245974871 is 178479542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245974871 is a prime.

Together with 245974873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245974873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122987435 + 122987436.

It is an arithmetic number, because the mean of its divisors is an integer number (122987436).

Almost surely, 2^245974871 is an apocalyptic number.

245974871 is a deficient number, since it is larger than the sum of its proper divisors (1).

245974871 is an equidigital number, since it uses as much as digits as its factorization.

245974871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 245974871 is about 15683.5860376382. The cubic root of 245974871 is about 626.5613196550.

The spelling of 245974871 in words is "two hundred forty-five million, nine hundred seventy-four thousand, eight hundred seventy-one".