1600385987 has 2 divisors, whose sum is σ = 1600385988. Its totient is φ = 1600385986.

The previous prime is 1600385981. The next prime is 1600386019. The reversal of 1600385987 is 7895830061.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1600385987 - 2¹⁸ = 1600123843 is a prime.

It is a super-2 number, since 2×1600385987² = 5122470614771928338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1600385981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800192993 + 800192994.

It is an arithmetic number, because the mean of its divisors is an integer number (800192994).

Almost surely, 2^1600385987 is an apocalyptic number.

1600385987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600385987 is an equidigital number, since it uses as much as digits as its factorization.

1600385987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1600385987 is about 40004.8245465469. The cubic root of 1600385987 is about 1169.7011404592.

The spelling of 1600385987 in words is "one billion, six hundred million, three hundred eighty-five thousand, nine hundred eighty-seven".