2908861 has 2 divisors, whose sum is σ = 2908862. Its totient is φ = 2908860.

The previous prime is 2908847. The next prime is 2908889. The reversal of 2908861 is 1688092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 820836 = 1445^2 + 906^2 .

It is a cyclic number.

It is not a de Polignac number, because 2908861 - 2¹³ = 2900669 is a prime.

It is a super-2 number, since 2×2908861² = 16922944634642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2908811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1454430 + 1454431.

It is an arithmetic number, because the mean of its divisors is an integer number (1454431).

2^2908861 is an apocalyptic number.

It is an amenable number.

2908861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2908861 is an equidigital number, since it uses as much as digits as its factorization.

2908861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 2908861 is about 1705.5383314367. The cubic root of 2908861 is about 142.7494103478.

The spelling of 2908861 in words is "two million, nine hundred eight thousand, eight hundred sixty-one".