1887091 has 2 divisors, whose sum is σ = 1887092. Its totient is φ = 1887090.

The previous prime is 1887079. The next prime is 1887103. The reversal of 1887091 is 1907881.

It is a balanced prime because it is at equal distance from previous prime (1887079) and next prime (1887103).

It is a cyclic number.

It is not a de Polignac number, because 1887091 - 2¹¹ = 1885043 is a prime.

It is a super-2 number, since 2×1887091² = 7122224884562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1887071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 943545 + 943546.

It is an arithmetic number, because the mean of its divisors is an integer number (943546).

2^1887091 is an apocalyptic number.

1887091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1887091 is an equidigital number, since it uses as much as digits as its factorization.

1887091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 1887091 is about 1373.7143079986. The cubic root of 1887091 is about 123.5750935176.

The spelling of 1887091 in words is "one million, eight hundred eighty-seven thousand, ninety-one".