451320197 has 2 divisors, whose sum is σ = 451320198. Its totient is φ = 451320196.

The previous prime is 451320161. The next prime is 451320223. The reversal of 451320197 is 791023154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351600001 + 99720196 = 18751^2 + 9986^2 .

It is a cyclic number.

It is not a de Polignac number, because 451320197 - 2¹⁸ = 451058053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451320137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225660098 + 225660099.

It is an arithmetic number, because the mean of its divisors is an integer number (225660099).

Almost surely, 2^451320197 is an apocalyptic number.

It is an amenable number.

451320197 is a deficient number, since it is larger than the sum of its proper divisors (1).

451320197 is an equidigital number, since it uses as much as digits as its factorization.

451320197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 451320197 is about 21244.2979879308. The cubic root of 451320197 is about 767.0580928956.

The spelling of 451320197 in words is "four hundred fifty-one million, three hundred twenty thousand, one hundred ninety-seven".