245009643 has 8 divisors (see below), whose sum is σ = 328390656. Its totient is φ = 162484200.

The previous prime is 245009621. The next prime is 245009659. The reversal of 245009643 is 346900542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 245009643 - 2⁹ = 245009131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245009663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213223 + ... + 214368.

It is an arithmetic number, because the mean of its divisors is an integer number (41048832).

Almost surely, 2^245009643 is an apocalyptic number.

245009643 is a deficient number, since it is larger than the sum of its proper divisors (83381013).

245009643 is a wasteful number, since it uses less digits than its factorization.

245009643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427785.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 245009643 is about 15652.7838738034. The cubic root of 245009643 is about 625.7406838997.

It can be divided in two parts, 24500 and 9643, that added together give a palindrome (34143).

The spelling of 245009643 in words is "two hundred forty-five million, nine thousand, six hundred forty-three".