245650397 has 2 divisors, whose sum is σ = 245650398. Its totient is φ = 245650396.

The previous prime is 245650381. The next prime is 245650399. The reversal of 245650397 is 793056542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159921316 + 85729081 = 12646^2 + 9259^2 .

It is a cyclic number.

It is not a de Polignac number, because 245650397 - 2⁴ = 245650381 is a prime.

Together with 245650399, 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 (245650399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122825198 + 122825199.

It is an arithmetic number, because the mean of its divisors is an integer number (122825199).

Almost surely, 2^245650397 is an apocalyptic number.

It is an amenable number.

245650397 is a deficient number, since it is larger than the sum of its proper divisors (1).

245650397 is an equidigital number, since it uses as much as digits as its factorization.

245650397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 245650397 is about 15673.2382423033. The cubic root of 245650397 is about 626.2856921529.

The spelling of 245650397 in words is "two hundred forty-five million, six hundred fifty thousand, three hundred ninety-seven".