245976779 has 2 divisors, whose sum is σ = 245976780. Its totient is φ = 245976778.

The previous prime is 245976751. The next prime is 245976781. The reversal of 245976779 is 977679542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245976779 is a prime.

It is a super-4 number, since 4×245976779⁴ (a number of 35 digits) contains 4444 as substring.

Together with 245976781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (245976719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122988389 + 122988390.

It is an arithmetic number, because the mean of its divisors is an integer number (122988390).

Almost surely, 2^245976779 is an apocalyptic number.

245976779 is a deficient number, since it is larger than the sum of its proper divisors (1).

245976779 is an equidigital number, since it uses as much as digits as its factorization.

245976779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6667920, while the sum is 56.

The square root of 245976779 is about 15683.6468654455. The cubic root of 245976779 is about 626.5629397065.

The spelling of 245976779 in words is "two hundred forty-five million, nine hundred seventy-six thousand, seven hundred seventy-nine".