245136173 has 4 divisors (see below), whose sum is σ = 245167488. Its totient is φ = 245104860.

The previous prime is 245136167. The next prime is 245136179. The reversal of 245136173 is 371631542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (245136167) and next prime (245136179).

It is a cyclic number.

It is not a de Polignac number, because 245136173 - 2²⁴ = 228358957 is a prime.

It is a super-4 number, since 4×245136173⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245136179) 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, 7718 + ... + 23448.

It is an arithmetic number, because the mean of its divisors is an integer number (61291872).

Almost surely, 2^245136173 is an apocalyptic number.

It is an amenable number.

245136173 is a deficient number, since it is larger than the sum of its proper divisors (31315).

245136173 is a wasteful number, since it uses less digits than its factorization.

245136173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31314.

The product of its digits is 15120, while the sum is 32.

The square root of 245136173 is about 15656.8251251651. The cubic root of 245136173 is about 625.8483821686.

The spelling of 245136173 in words is "two hundred forty-five million, one hundred thirty-six thousand, one hundred seventy-three".