245641393 has 4 divisors (see below), whose sum is σ = 248073588. Its totient is φ = 243209200.

The previous prime is 245641391. The next prime is 245641433. The reversal of 245641393 is 393146542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393146542 = 2 ⋅196573271.

It can be written as a sum of positive squares in 2 ways, for example, as 177875569 + 67765824 = 13337^2 + 8232^2 .

It is a cyclic number.

It is not a de Polignac number, because 245641393 - 2¹ = 245641391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245641391) 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, 1215946 + ... + 1216147.

It is an arithmetic number, because the mean of its divisors is an integer number (62018397).

Almost surely, 2^245641393 is an apocalyptic number.

It is an amenable number.

245641393 is a deficient number, since it is larger than the sum of its proper divisors (2432195).

245641393 is a wasteful number, since it uses less digits than its factorization.

245641393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432194.

The product of its digits is 77760, while the sum is 37.

The square root of 245641393 is about 15672.9509984559. The cubic root of 245641393 is about 626.2780401600.

The spelling of 245641393 in words is "two hundred forty-five million, six hundred forty-one thousand, three hundred ninety-three".