3121091 has 2 divisors, whose sum is σ = 3121092. Its totient is φ = 3121090.

The previous prime is 3121087. The next prime is 3121109. The reversal of 3121091 is 1901213.

It is a happy number.

Together with next prime (3121109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121091 - 2² = 3121087 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3121051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560545 + 1560546.

It is an arithmetic number, because the mean of its divisors is an integer number (1560546).

Almost surely, 2^3121091 is an apocalyptic number.

3121091 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121091 is an equidigital number, since it uses as much as digits as its factorization.

3121091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 3121091 is about 1766.6609748336. The cubic root of 3121091 is about 146.1399015533.

The spelling of 3121091 in words is "three million, one hundred twenty-one thousand, ninety-one".