245428397 has 4 divisors (see below), whose sum is σ = 245499516. Its totient is φ = 245357280.

The previous prime is 245428373. The next prime is 245428399. The reversal of 245428397 is 793824542.

245428397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123965956 + 121462441 = 11134^2 + 11021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245428397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245428399) 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, 30104 + ... + 37377.

It is an arithmetic number, because the mean of its divisors is an integer number (61374879).

Almost surely, 2^245428397 is an apocalyptic number.

It is an amenable number.

245428397 is a deficient number, since it is larger than the sum of its proper divisors (71119).

245428397 is an equidigital number, since it uses as much as digits as its factorization.

245428397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71118.

The product of its digits is 483840, while the sum is 44.

The square root of 245428397 is about 15666.1545058128. The cubic root of 245428397 is about 626.0969722898.

The spelling of 245428397 in words is "two hundred forty-five million, four hundred twenty-eight thousand, three hundred ninety-seven".