1012209239 has 2 divisors, whose sum is σ = 1012209240. Its totient is φ = 1012209238.

The previous prime is 1012209217. The next prime is 1012209269. The reversal of 1012209239 is 9329022101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012209239 - 2²⁴ = 995432023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012209269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506104619 + 506104620.

It is an arithmetic number, because the mean of its divisors is an integer number (506104620).

Almost surely, 2^1012209239 is an apocalyptic number.

1012209239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012209239 is an equidigital number, since it uses as much as digits as its factorization.

1012209239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1012209239 is about 31815.2359570065. The cubic root of 1012209239 is about 1004.0532949360.

The spelling of 1012209239 in words is "one billion, twelve million, two hundred nine thousand, two hundred thirty-nine".