245172073 has 2 divisors, whose sum is σ = 245172074. Its totient is φ = 245172072.

The previous prime is 245172071. The next prime is 245172091. The reversal of 245172073 is 370271542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206583129 + 38588944 = 14373^2 + 6212^2 .

It is a cyclic number.

It is not a de Polignac number, because 245172073 - 2¹ = 245172071 is a prime.

Together with 245172071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (245172071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122586036 + 122586037.

It is an arithmetic number, because the mean of its divisors is an integer number (122586037).

Almost surely, 2^245172073 is an apocalyptic number.

It is an amenable number.

245172073 is a deficient number, since it is larger than the sum of its proper divisors (1).

245172073 is an equidigital number, since it uses as much as digits as its factorization.

245172073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 245172073 is about 15657.9715480646. The cubic root of 245172073 is about 625.8789323453.

The spelling of 245172073 in words is "two hundred forty-five million, one hundred seventy-two thousand, seventy-three".