2906381 has 2 divisors, whose sum is σ = 2906382. Its totient is φ = 2906380.

The previous prime is 2906363. The next prime is 2906401. The reversal of 2906381 is 1836092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1716100 + 1190281 = 1310^2 + 1091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2906381 is a prime.

It is a super-2 number, since 2×2906381² = 16894101034322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2906081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1453190 + 1453191.

It is an arithmetic number, because the mean of its divisors is an integer number (1453191).

2^2906381 is an apocalyptic number.

It is an amenable number.

2906381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2906381 is an equidigital number, since it uses as much as digits as its factorization.

2906381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2906381 is about 1704.8111332344. The cubic root of 2906381 is about 142.7088309832.

The spelling of 2906381 in words is "two million, nine hundred six thousand, three hundred eighty-one".