245009903 has 2 divisors, whose sum is σ = 245009904. Its totient is φ = 245009902.

The previous prime is 245009837. The next prime is 245009929. The reversal of 245009903 is 309900542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245009903 - 2¹⁶ = 244944367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245009903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245009983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122504951 + 122504952.

It is an arithmetic number, because the mean of its divisors is an integer number (122504952).

Almost surely, 2^245009903 is an apocalyptic number.

245009903 is a deficient number, since it is larger than the sum of its proper divisors (1).

245009903 is an equidigital number, since it uses as much as digits as its factorization.

245009903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 245009903 is about 15652.7921790331. The cubic root of 245009903 is about 625.7409052413.

The spelling of 245009903 in words is "two hundred forty-five million, nine thousand, nine hundred three".