245720047 has 2 divisors, whose sum is σ = 245720048. Its totient is φ = 245720046.

The previous prime is 245719979. The next prime is 245720053. The reversal of 245720047 is 740027542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245720047 - 2¹⁵ = 245687279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245720087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122860023 + 122860024.

It is an arithmetic number, because the mean of its divisors is an integer number (122860024).

Almost surely, 2^245720047 is an apocalyptic number.

245720047 is a deficient number, since it is larger than the sum of its proper divisors (1).

245720047 is an equidigital number, since it uses as much as digits as its factorization.

245720047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 245720047 is about 15675.4600251476. The cubic root of 245720047 is about 626.3448774517.

Adding to 245720047 its reverse (740027542), we get a palindrome (985747589).

The spelling of 245720047 in words is "two hundred forty-five million, seven hundred twenty thousand, forty-seven".