4139212409 has 2 divisors, whose sum is σ = 4139212410. Its totient is φ = 4139212408.

The previous prime is 4139212397. The next prime is 4139212463. The reversal of 4139212409 is 9042129314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3223968400 + 915244009 = 56780^2 + 30253^2 .

It is a cyclic number.

It is not a de Polignac number, because 4139212409 - 2⁴ = 4139212393 is a prime.

It is not a weakly prime, because it can be changed into another prime (4139212489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069606204 + 2069606205.

It is an arithmetic number, because the mean of its divisors is an integer number (2069606205).

Almost surely, 2^4139212409 is an apocalyptic number.

It is an amenable number.

4139212409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4139212409 is an equidigital number, since it uses as much as digits as its factorization.

4139212409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 4139212409 is about 64336.7112075213. The cubic root of 4139212409 is about 1605.6069441641.

The spelling of 4139212409 in words is "four billion, one hundred thirty-nine million, two hundred twelve thousand, four hundred nine".