245416909 has 2 divisors, whose sum is σ = 245416910. Its totient is φ = 245416908.

The previous prime is 245416891. The next prime is 245416943. The reversal of 245416909 is 909614542.

245416909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209380900 + 36036009 = 14470^2 + 6003^2 .

It is a cyclic number.

It is not a de Polignac number, because 245416909 - 2¹⁹ = 244892621 is a prime.

It is a super-2 number, since 2×245416909² = 120458918446228562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245410909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122708454 + 122708455.

It is an arithmetic number, because the mean of its divisors is an integer number (122708455).

Almost surely, 2^245416909 is an apocalyptic number.

It is an amenable number.

245416909 is a deficient number, since it is larger than the sum of its proper divisors (1).

245416909 is an equidigital number, since it uses as much as digits as its factorization.

245416909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 245416909 is about 15665.7878512381. The cubic root of 245416909 is about 626.0872033655.

The spelling of 245416909 in words is "two hundred forty-five million, four hundred sixteen thousand, nine hundred nine".