245445923 has 4 divisors (see below), whose sum is σ = 247319688. Its totient is φ = 243572160.

The previous prime is 245445919. The next prime is 245445931. The reversal of 245445923 is 329544542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245445923 - 2² = 245445919 is a prime.

It is a super-2 number, since 2×245445923² = 120487402234643858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245445943) 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 in 3 ways as a sum of consecutive naturals, for example, 936686 + ... + 936947.

It is an arithmetic number, because the mean of its divisors is an integer number (61829922).

Almost surely, 2^245445923 is an apocalyptic number.

245445923 is a deficient number, since it is larger than the sum of its proper divisors (1873765).

245445923 is a wasteful number, since it uses less digits than its factorization.

245445923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873764.

The product of its digits is 172800, while the sum is 38.

The square root of 245445923 is about 15666.7138545389. The cubic root of 245445923 is about 626.1118750944. Note that the first 3 decimals are identical.

The spelling of 245445923 in words is "two hundred forty-five million, four hundred forty-five thousand, nine hundred twenty-three".