245642923 has 2 divisors, whose sum is σ = 245642924. Its totient is φ = 245642922.

The previous prime is 245642879. The next prime is 245642927. The reversal of 245642923 is 329246542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245642923 is a prime.

It is not a weakly prime, because it can be changed into another prime (245642927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122821461 + 122821462.

It is an arithmetic number, because the mean of its divisors is an integer number (122821462).

Almost surely, 2^245642923 is an apocalyptic number.

245642923 is a deficient number, since it is larger than the sum of its proper divisors (1).

245642923 is an equidigital number, since it uses as much as digits as its factorization.

245642923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 37.

The square root of 245642923 is about 15672.9998085880. Note that the first 3 decimals coincide. The cubic root of 245642923 is about 626.2793404341.

The spelling of 245642923 in words is "two hundred forty-five million, six hundred forty-two thousand, nine hundred twenty-three".