2918857 has 2 divisors, whose sum is σ = 2918858. Its totient is φ = 2918856.

The previous prime is 2918809. The next prime is 2918873. The reversal of 2918857 is 7588192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2253001 + 665856 = 1501^2 + 816^2 .

It is a cyclic number.

It is not a de Polignac number, because 2918857 - 2¹⁵ = 2886089 is a prime.

It is not a weakly prime, because it can be changed into another prime (2918807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1459428 + 1459429.

It is an arithmetic number, because the mean of its divisors is an integer number (1459429).

2^2918857 is an apocalyptic number.

It is an amenable number.

2918857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2918857 is an equidigital number, since it uses as much as digits as its factorization.

2918857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 40.

The square root of 2918857 is about 1708.4662712503. The cubic root of 2918857 is about 142.9127379329.

The spelling of 2918857 in words is "two million, nine hundred eighteen thousand, eight hundred fifty-seven".