245611913 has 2 divisors, whose sum is σ = 245611914. Its totient is φ = 245611912.

The previous prime is 245611859. The next prime is 245611943. The reversal of 245611913 is 319116542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220581904 + 25030009 = 14852^2 + 5003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245611913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 245611913.

It is not a weakly prime, because it can be changed into another prime (245611943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122805956 + 122805957.

It is an arithmetic number, because the mean of its divisors is an integer number (122805957).

Almost surely, 2^245611913 is an apocalyptic number.

It is an amenable number.

245611913 is a deficient number, since it is larger than the sum of its proper divisors (1).

245611913 is an equidigital number, since it uses as much as digits as its factorization.

245611913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 245611913 is about 15672.0104964232. The cubic root of 245611913 is about 626.2529854586.

The spelling of 245611913 in words is "two hundred forty-five million, six hundred eleven thousand, nine hundred thirteen".