1604134787 has 2 divisors, whose sum is σ = 1604134788. Its totient is φ = 1604134786.

The previous prime is 1604134757. The next prime is 1604134811. The reversal of 1604134787 is 7874314061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1604134787 - 2¹⁰ = 1604133763 is a prime.

It is not a weakly prime, because it can be changed into another prime (1604134757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802067393 + 802067394.

It is an arithmetic number, because the mean of its divisors is an integer number (802067394).

Almost surely, 2^1604134787 is an apocalyptic number.

1604134787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604134787 is an equidigital number, since it uses as much as digits as its factorization.

1604134787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 1604134787 is about 40051.6514890460. The cubic root of 1604134787 is about 1170.6137445184.

The spelling of 1604134787 in words is "one billion, six hundred four million, one hundred thirty-four thousand, seven hundred eighty-seven".