245381749 has 2 divisors, whose sum is σ = 245381750. Its totient is φ = 245381748.

The previous prime is 245381729. The next prime is 245381797. The reversal of 245381749 is 947183542.

245381749 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., 245141649 + 240100 = 15657^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 245381749 - 2⁹ = 245381237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245381729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122690874 + 122690875.

It is an arithmetic number, because the mean of its divisors is an integer number (122690875).

Almost surely, 2^245381749 is an apocalyptic number.

It is an amenable number.

245381749 is a deficient number, since it is larger than the sum of its proper divisors (1).

245381749 is an equidigital number, since it uses as much as digits as its factorization.

245381749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 245381749 is about 15664.6656204338. The cubic root of 245381749 is about 626.0573028485.

The spelling of 245381749 in words is "two hundred forty-five million, three hundred eighty-one thousand, seven hundred forty-nine".