245977513 has 2 divisors, whose sum is σ = 245977514. Its totient is φ = 245977512.

The previous prime is 245977469. The next prime is 245977531. The reversal of 245977513 is 315779542.

245977513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (245977531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135559449 + 110418064 = 11643^2 + 10508^2 .

It is a cyclic number.

It is not a de Polignac number, because 245977513 - 2⁹ = 245977001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245977513.

It is not a weakly prime, because it can be changed into another prime (245977213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122988756 + 122988757.

It is an arithmetic number, because the mean of its divisors is an integer number (122988757).

Almost surely, 2^245977513 is an apocalyptic number.

It is an amenable number.

245977513 is a deficient number, since it is larger than the sum of its proper divisors (1).

245977513 is an equidigital number, since it uses as much as digits as its factorization.

245977513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 43.

The square root of 245977513 is about 15683.6702655979. The cubic root of 245977513 is about 626.5635629317.

The spelling of 245977513 in words is "two hundred forty-five million, nine hundred seventy-seven thousand, five hundred thirteen".