2018651 has 2 divisors, whose sum is σ = 2018652. Its totient is φ = 2018650.

The previous prime is 2018647. The next prime is 2018663. The reversal of 2018651 is 1568102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2018651 - 2² = 2018647 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 6.

It is not a weakly prime, because it can be changed into another prime (2018671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009325 + 1009326.

It is an arithmetic number, because the mean of its divisors is an integer number (1009326).

2^2018651 is an apocalyptic number.

2018651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2018651 is an equidigital number, since it uses as much as digits as its factorization.

2018651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2018651 is about 1420.7923845517. The cubic root of 2018651 is about 126.3825402832.

The spelling of 2018651 in words is "two million, eighteen thousand, six hundred fifty-one".