245772749 has 2 divisors, whose sum is σ = 245772750. Its totient is φ = 245772748.

The previous prime is 245772727. The next prime is 245772773. The reversal of 245772749 is 947277542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200788900 + 44983849 = 14170^2 + 6707^2 .

It is a cyclic number.

It is not a de Polignac number, because 245772749 - 2¹⁶ = 245707213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245772799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122886374 + 122886375.

It is an arithmetic number, because the mean of its divisors is an integer number (122886375).

Almost surely, 2^245772749 is an apocalyptic number.

It is an amenable number.

245772749 is a deficient number, since it is larger than the sum of its proper divisors (1).

245772749 is an equidigital number, since it uses as much as digits as its factorization.

245772749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 47.

The square root of 245772749 is about 15677.1409702152. The cubic root of 245772749 is about 626.3896537035.

The spelling of 245772749 in words is "two hundred forty-five million, seven hundred seventy-two thousand, seven hundred forty-nine".