496978409 has 2 divisors, whose sum is σ = 496978410. Its totient is φ = 496978408.

The previous prime is 496978381. The next prime is 496978429. The reversal of 496978409 is 904879694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374809600 + 122168809 = 19360^2 + 11053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-496978409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (496978429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248489204 + 248489205.

It is an arithmetic number, because the mean of its divisors is an integer number (248489205).

Almost surely, 2^496978409 is an apocalyptic number.

It is an amenable number.

496978409 is a deficient number, since it is larger than the sum of its proper divisors (1).

496978409 is an equidigital number, since it uses as much as digits as its factorization.

496978409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 496978409 is about 22293.0125599929. The cubic root of 496978409 is about 792.0984688855.

The spelling of 496978409 in words is "four hundred ninety-six million, nine hundred seventy-eight thousand, four hundred nine".