245687279 has 2 divisors, whose sum is σ = 245687280. Its totient is φ = 245687278.

The previous prime is 245687257. The next prime is 245687287. The reversal of 245687279 is 972786542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245687279 - 2¹⁶ = 245621743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245687249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122843639 + 122843640.

It is an arithmetic number, because the mean of its divisors is an integer number (122843640).

Almost surely, 2^245687279 is an apocalyptic number.

245687279 is a deficient number, since it is larger than the sum of its proper divisors (1).

245687279 is an equidigital number, since it uses as much as digits as its factorization.

245687279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 245687279 is about 15674.4147897138. The cubic root of 245687279 is about 626.3170341376.

The spelling of 245687279 in words is "two hundred forty-five million, six hundred eighty-seven thousand, two hundred seventy-nine".