245720023 has 4 divisors (see below), whose sum is σ = 260174160. Its totient is φ = 231265888.

The previous prime is 245719979. The next prime is 245720047. The reversal of 245720023 is 320027542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320027542 = 2 ⋅160013771.

It is a cyclic number.

It is not a de Polignac number, because 245720023 - 2¹³ = 245711831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245720023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245720053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7227043 + ... + 7227076.

It is an arithmetic number, because the mean of its divisors is an integer number (65043540).

Almost surely, 2^245720023 is an apocalyptic number.

245720023 is a deficient number, since it is larger than the sum of its proper divisors (14454137).

245720023 is a wasteful number, since it uses less digits than its factorization.

245720023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14454136.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 245720023 is about 15675.4592596198. The cubic root of 245720023 is about 626.3448570596.

Adding to 245720023 its reverse (320027542), we get a palindrome (565747565).

The spelling of 245720023 in words is "two hundred forty-five million, seven hundred twenty thousand, twenty-three".