245791789 has 2 divisors, whose sum is σ = 245791790. Its totient is φ = 245791788.

The previous prime is 245791787. The next prime is 245791829. The reversal of 245791789 is 987197542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241958025 + 3833764 = 15555^2 + 1958^2 .

It is a cyclic number.

It is not a de Polignac number, because 245791789 - 2¹ = 245791787 is a prime.

Together with 245791787, 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 (245791787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122895894 + 122895895.

It is an arithmetic number, because the mean of its divisors is an integer number (122895895).

Almost surely, 2^245791789 is an apocalyptic number.

It is an amenable number.

245791789 is a deficient number, since it is larger than the sum of its proper divisors (1).

245791789 is an equidigital number, since it uses as much as digits as its factorization.

245791789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 52.

The square root of 245791789 is about 15677.7482120361. The cubic root of 245791789 is about 626.4058287420.

The spelling of 245791789 in words is "two hundred forty-five million, seven hundred ninety-one thousand, seven hundred eighty-nine".