245805929 has 2 divisors, whose sum is σ = 245805930. Its totient is φ = 245805928.

The previous prime is 245805919. The next prime is 245805979. The reversal of 245805929 is 929508542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227315929 + 18490000 = 15077^2 + 4300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245805929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245805929.

It is not a weakly prime, because it can be changed into another prime (245805919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122902964 + 122902965.

It is an arithmetic number, because the mean of its divisors is an integer number (122902965).

Almost surely, 2^245805929 is an apocalyptic number.

It is an amenable number.

245805929 is a deficient number, since it is larger than the sum of its proper divisors (1).

245805929 is an equidigital number, since it uses as much as digits as its factorization.

245805929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 245805929 is about 15678.1991631692. The cubic root of 245805929 is about 626.4178405462.

The spelling of 245805929 in words is "two hundred forty-five million, eight hundred five thousand, nine hundred twenty-nine".