1600091 has 8 divisors (see below), whose sum is σ = 1723104. Its totient is φ = 1480320.

The previous prime is 1600069. The next prime is 1600097. The reversal of 1600091 is 1900061.

1600091 = 131² + 132² + ... + 191².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1600091 - 2¹⁰ = 1599067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

1600091 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1600097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266 + ... + 1808.

It is an arithmetic number, because the mean of its divisors is an integer number (215388).

2^1600091 is an apocalyptic number.

1600091 is a deficient number, since it is larger than the sum of its proper divisors (123013).

1600091 is a wasteful number, since it uses less digits than its factorization.

1600091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1600091 is about 1264.9470344643. The cubic root of 1600091 is about 116.9629268666.

The spelling of 1600091 in words is "one million, six hundred thousand, ninety-one".