1918087 has 2 divisors, whose sum is σ = 1918088. Its totient is φ = 1918086.

The previous prime is 1918079. The next prime is 1918097. The reversal of 1918087 is 7808191.

It is a weak prime.

It is an emirp because it is prime and its reverse (7808191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1918087 - 2³ = 1918079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1918027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959043 + 959044.

It is an arithmetic number, because the mean of its divisors is an integer number (959044).

2^1918087 is an apocalyptic number.

1918087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918087 is an equidigital number, since it uses as much as digits as its factorization.

1918087 is an evil number, because the sum of its binary digits is even.

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

The square root of 1918087 is about 1384.9501796094. The cubic root of 1918087 is about 124.2480078004.

The spelling of 1918087 in words is "one million, nine hundred eighteen thousand, eighty-seven".