4012901209 has 2 divisors, whose sum is σ = 4012901210. Its totient is φ = 4012901208.

The previous prime is 4012901203. The next prime is 4012901231. The reversal of 4012901209 is 9021092104.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3543225625 + 469675584 = 59525^2 + 21672^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012901209 - 2²⁷ = 3878683481 is a prime.

It is a super-2 number, since 2×4012901209² = 32206752226387323362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4012901203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006450604 + 2006450605.

It is an arithmetic number, because the mean of its divisors is an integer number (2006450605).

Almost surely, 2^4012901209 is an apocalyptic number.

It is an amenable number.

4012901209 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012901209 is an equidigital number, since it uses as much as digits as its factorization.

4012901209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 4012901209 is about 63347.4641086760. The cubic root of 4012901209 is about 1589.1058365261.

The spelling of 4012901209 in words is "four billion, twelve million, nine hundred one thousand, two hundred nine".