2790181 has 2 divisors, whose sum is σ = 2790182. Its totient is φ = 2790180.

The previous prime is 2790157. The next prime is 2790187. The reversal of 2790181 is 1810972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2772225 + 17956 = 1665^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 2790181 - 2⁵ = 2790149 is a prime.

It is a super-2 number, since 2×2790181² = 15570220025522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2790187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1395090 + 1395091.

It is an arithmetic number, because the mean of its divisors is an integer number (1395091).

2^2790181 is an apocalyptic number.

It is an amenable number.

2790181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2790181 is an equidigital number, since it uses as much as digits as its factorization.

2790181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 2790181 is about 1670.3834889031. The cubic root of 2790181 is about 140.7810259007.

The spelling of 2790181 in words is "two million, seven hundred ninety thousand, one hundred eighty-one".