245690239 has 4 divisors (see below), whose sum is σ = 260142624. Its totient is φ = 231237856.

The previous prime is 245690213. The next prime is 245690267. The reversal of 245690239 is 932096542.

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 245690239 - 2¹⁵ = 245657471 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245690279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7226167 + ... + 7226200.

It is an arithmetic number, because the mean of its divisors is an integer number (65035656).

Almost surely, 2^245690239 is an apocalyptic number.

245690239 is a deficient number, since it is larger than the sum of its proper divisors (14452385).

245690239 is a wasteful number, since it uses less digits than its factorization.

245690239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14452384.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 245690239 is about 15674.5092108174. The cubic root of 245690239 is about 626.3195493825.

The spelling of 245690239 in words is "two hundred forty-five million, six hundred ninety thousand, two hundred thirty-nine".