1918151 has 2 divisors, whose sum is σ = 1918152. Its totient is φ = 1918150.

The previous prime is 1918129. The next prime is 1918157. The reversal of 1918151 is 1518191.

It is a strong prime.

It is an emirp because it is prime and its reverse (1518191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1918151 - 2⁶ = 1918087 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1918151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1918157) 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 as a sum of consecutive naturals, namely, 959075 + 959076.

It is an arithmetic number, because the mean of its divisors is an integer number (959076).

2^1918151 is an apocalyptic number.

1918151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918151 is an equidigital number, since it uses as much as digits as its factorization.

1918151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 26.

The square root of 1918151 is about 1384.9732849409. The cubic root of 1918151 is about 124.2493896954.

The spelling of 1918151 in words is "one million, nine hundred eighteen thousand, one hundred fifty-one".