1909087 has 2 divisors, whose sum is σ = 1909088. Its totient is φ = 1909086.

The previous prime is 1909081. The next prime is 1909091. The reversal of 1909087 is 7809091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1909087 - 2³ = 1909079 is a prime.

It is a super-2 number, since 2×1909087² = 7289226347138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1909081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954543 + 954544.

It is an arithmetic number, because the mean of its divisors is an integer number (954544).

2^1909087 is an apocalyptic number.

1909087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1909087 is an equidigital number, since it uses as much as digits as its factorization.

1909087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1909087 is about 1381.6971448186. The cubic root of 1909087 is about 124.0533719256.

The spelling of 1909087 in words is "one million, nine hundred nine thousand, eighty-seven".