245093661 has 16 divisors (see below), whose sum is σ = 372916800. Its totient is φ = 158979024.

The previous prime is 245093647. The next prime is 245093663. The reversal of 245093661 is 166390542.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-245093661 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245093663) 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 15 ways as a sum of consecutive naturals, for example, 121671 + ... + 123668.

It is an arithmetic number, because the mean of its divisors is an integer number (23307300).

Almost surely, 2^245093661 is an apocalyptic number.

It is an amenable number.

245093661 is a deficient number, since it is larger than the sum of its proper divisors (127823139).

245093661 is a wasteful number, since it uses less digits than its factorization.

245093661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245385 (or 245379 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 245093661 is about 15655.4674475086. The cubic root of 245093661 is about 625.8122014555.

The spelling of 245093661 in words is "two hundred forty-five million, ninety-three thousand, six hundred sixty-one".