451942369 has 2 divisors, whose sum is σ = 451942370. Its totient is φ = 451942368.

The previous prime is 451942367. The next prime is 451942429. The reversal of 451942369 is 963249154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437311744 + 14630625 = 20912^2 + 3825^2 .

It is a cyclic number.

It is not a de Polignac number, because 451942369 - 2¹ = 451942367 is a prime.

It is a super-2 number, since 2×451942369² = 408503809794664322, which contains 22 as substring.

Together with 451942367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (451942367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225971184 + 225971185.

It is an arithmetic number, because the mean of its divisors is an integer number (225971185).

Almost surely, 2^451942369 is an apocalyptic number.

It is an amenable number.

451942369 is a deficient number, since it is larger than the sum of its proper divisors (1).

451942369 is an equidigital number, since it uses as much as digits as its factorization.

451942369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 451942369 is about 21258.9362151543. The cubic root of 451942369 is about 767.4104096000.

The spelling of 451942369 in words is "four hundred fifty-one million, nine hundred forty-two thousand, three hundred sixty-nine".