245686957 has 2 divisors, whose sum is σ = 245686958. Its totient is φ = 245686956.

The previous prime is 245686949. The next prime is 245686979. The reversal of 245686957 is 759686542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145106116 + 100580841 = 12046^2 + 10029^2 .

It is a cyclic number.

It is not a de Polignac number, because 245686957 - 2³ = 245686949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245686937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122843478 + 122843479.

It is an arithmetic number, because the mean of its divisors is an integer number (122843479).

Almost surely, 2^245686957 is an apocalyptic number.

It is an amenable number.

245686957 is a deficient number, since it is larger than the sum of its proper divisors (1).

245686957 is an equidigital number, since it uses as much as digits as its factorization.

245686957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 52.

The square root of 245686957 is about 15674.4045181946. The cubic root of 245686957 is about 626.3167605186.

The spelling of 245686957 in words is "two hundred forty-five million, six hundred eighty-six thousand, nine hundred fifty-seven".