451078409 has 2 divisors, whose sum is σ = 451078410. Its totient is φ = 451078408.

The previous prime is 451078403. The next prime is 451078417. The reversal of 451078409 is 904870154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415018384 + 36060025 = 20372^2 + 6005^2 .

It is a cyclic number.

It is not a de Polignac number, because 451078409 - 2¹² = 451074313 is a prime.

It is not a weakly prime, because it can be changed into another prime (451078403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225539204 + 225539205.

It is an arithmetic number, because the mean of its divisors is an integer number (225539205).

Almost surely, 2^451078409 is an apocalyptic number.

It is an amenable number.

451078409 is a deficient number, since it is larger than the sum of its proper divisors (1).

451078409 is an equidigital number, since it uses as much as digits as its factorization.

451078409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 451078409 is about 21238.6065691702. The cubic root of 451078409 is about 766.9210884855.

The spelling of 451078409 in words is "four hundred fifty-one million, seventy-eight thousand, four hundred nine".