536878409 has 2 divisors, whose sum is σ = 536878410. Its totient is φ = 536878408.

The previous prime is 536878379. The next prime is 536878453. The reversal of 536878409 is 904878635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534904384 + 1974025 = 23128^2 + 1405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-536878409 is a prime.

It is not a weakly prime, because it can be changed into another prime (536878009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268439204 + 268439205.

It is an arithmetic number, because the mean of its divisors is an integer number (268439205).

Almost surely, 2^536878409 is an apocalyptic number.

It is an amenable number.

536878409 is a deficient number, since it is larger than the sum of its proper divisors (1).

536878409 is an equidigital number, since it uses as much as digits as its factorization.

536878409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 536878409 is about 23170.6367845167. The cubic root of 536878409 is about 812.7531217353.

The spelling of 536878409 in words is "five hundred thirty-six million, eight hundred seventy-eight thousand, four hundred nine".