492181409 has 2 divisors, whose sum is σ = 492181410. Its totient is φ = 492181408.

The previous prime is 492181387. The next prime is 492181429. The reversal of 492181409 is 904181294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292581025 + 199600384 = 17105^2 + 14128^2 .

It is a cyclic number.

It is not a de Polignac number, because 492181409 - 2⁸ = 492181153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (492181429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246090704 + 246090705.

It is an arithmetic number, because the mean of its divisors is an integer number (246090705).

Almost surely, 2^492181409 is an apocalyptic number.

It is an amenable number.

492181409 is a deficient number, since it is larger than the sum of its proper divisors (1).

492181409 is an equidigital number, since it uses as much as digits as its factorization.

492181409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 492181409 is about 22185.1619106104. The cubic root of 492181409 is about 789.5416927246.

The spelling of 492181409 in words is "four hundred ninety-two million, one hundred eighty-one thousand, four hundred nine".