245632391 has 2 divisors, whose sum is σ = 245632392. Its totient is φ = 245632390.

The previous prime is 245632367. The next prime is 245632393. The reversal of 245632391 is 193236542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245632391 is a prime.

Together with 245632393, 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 (245632393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122816195 + 122816196.

It is an arithmetic number, because the mean of its divisors is an integer number (122816196).

Almost surely, 2^245632391 is an apocalyptic number.

245632391 is a deficient number, since it is larger than the sum of its proper divisors (1).

245632391 is an equidigital number, since it uses as much as digits as its factorization.

245632391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 245632391 is about 15672.6638131493. The cubic root of 245632391 is about 626.2703896799.

The spelling of 245632391 in words is "two hundred forty-five million, six hundred thirty-two thousand, three hundred ninety-one".