227129939 has 4 divisors (see below), whose sum is σ = 233268624. Its totient is φ = 220991256.

The previous prime is 227129909. The next prime is 227129941. The reversal of 227129939 is 939921722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939921722 = 2 ⋅469960861.

It is a cyclic number.

It is not a de Polignac number, because 227129939 - 2²⁰ = 226081363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 227129939.

It is not an unprimeable number, because it can be changed into a prime (227129909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3069287 + ... + 3069360.

It is an arithmetic number, because the mean of its divisors is an integer number (58317156).

Almost surely, 2^227129939 is an apocalyptic number.

227129939 is a deficient number, since it is larger than the sum of its proper divisors (6138685).

227129939 is an equidigital number, since it uses as much as digits as its factorization.

227129939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138684.

The product of its digits is 122472, while the sum is 44.

The square root of 227129939 is about 15070.8307335727. The cubic root of 227129939 is about 610.1333928471.

The spelling of 227129939 in words is "two hundred twenty-seven million, one hundred twenty-nine thousand, nine hundred thirty-nine".