245679457 has 2 divisors, whose sum is σ = 245679458. Its totient is φ = 245679456.

The previous prime is 245679451. The next prime is 245679509. The reversal of 245679457 is 754976542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222725776 + 22953681 = 14924^2 + 4791^2 .

It is a cyclic number.

It is not a de Polignac number, because 245679457 - 2³ = 245679449 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245679457.

It is not a weakly prime, because it can be changed into another prime (245679451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122839728 + 122839729.

It is an arithmetic number, because the mean of its divisors is an integer number (122839729).

Almost surely, 2^245679457 is an apocalyptic number.

It is an amenable number.

245679457 is a deficient number, since it is larger than the sum of its proper divisors (1).

245679457 is an equidigital number, since it uses as much as digits as its factorization.

245679457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 49.

The square root of 245679457 is about 15674.1652728303. The cubic root of 245679457 is about 626.3103873360.

The spelling of 245679457 in words is "two hundred forty-five million, six hundred seventy-nine thousand, four hundred fifty-seven".