1604561087 has 2 divisors, whose sum is σ = 1604561088. Its totient is φ = 1604561086.

The previous prime is 1604561051. The next prime is 1604561137. The reversal of 1604561087 is 7801654061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1604561087 - 2⁸ = 1604560831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1604561087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604561587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802280543 + 802280544.

It is an arithmetic number, because the mean of its divisors is an integer number (802280544).

Almost surely, 2^1604561087 is an apocalyptic number.

1604561087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604561087 is an equidigital number, since it uses as much as digits as its factorization.

1604561087 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 1604561087 is about 40056.9730134467. The cubic root of 1604561087 is about 1170.7174324886.

The spelling of 1604561087 in words is "one billion, six hundred four million, five hundred sixty-one thousand, eighty-seven".