245439671 has 2 divisors, whose sum is σ = 245439672. Its totient is φ = 245439670.

The previous prime is 245439641. The next prime is 245439697. The reversal of 245439671 is 176934542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245439671 - 2¹⁰ = 245438647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245439641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122719835 + 122719836.

It is an arithmetic number, because the mean of its divisors is an integer number (122719836).

Almost surely, 2^245439671 is an apocalyptic number.

245439671 is a deficient number, since it is larger than the sum of its proper divisors (1).

245439671 is an equidigital number, since it uses as much as digits as its factorization.

245439671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 245439671 is about 15666.5143219543. The cubic root of 245439671 is about 626.1065589408.

The spelling of 245439671 in words is "two hundred forty-five million, four hundred thirty-nine thousand, six hundred seventy-one".