245638069 has 2 divisors, whose sum is σ = 245638070. Its totient is φ = 245638068.

The previous prime is 245638067. The next prime is 245638073. The reversal of 245638069 is 960836542.

245638069 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., 185776900 + 59861169 = 13630^2 + 7737^2 .

It is a cyclic number.

It is not a de Polignac number, because 245638069 - 2¹ = 245638067 is a prime.

It is a super-2 number, since 2×245638069² = 120676121884097522, which contains 22 as substring.

Together with 245638067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245638067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122819034 + 122819035.

It is an arithmetic number, because the mean of its divisors is an integer number (122819035).

Almost surely, 2^245638069 is an apocalyptic number.

It is an amenable number.

245638069 is a deficient number, since it is larger than the sum of its proper divisors (1).

245638069 is an equidigital number, since it uses as much as digits as its factorization.

245638069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 245638069 is about 15672.8449555274. The cubic root of 245638069 is about 626.2752152322.

The spelling of 245638069 in words is "two hundred forty-five million, six hundred thirty-eight thousand, sixty-nine".