4921139 has 2 divisors, whose sum is σ = 4921140. Its totient is φ = 4921138.

The previous prime is 4921129. The next prime is 4921151. The reversal of 4921139 is 9311294.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4921139 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4921129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2460569 + 2460570.

It is an arithmetic number, because the mean of its divisors is an integer number (2460570).

Almost surely, 2^4921139 is an apocalyptic number.

4921139 is a deficient number, since it is larger than the sum of its proper divisors (1).

4921139 is an equidigital number, since it uses as much as digits as its factorization.

4921139 is an evil number, because the sum of its binary digits is even.

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

The square root of 4921139 is about 2218.3640368524. The cubic root of 4921139 is about 170.0938236414.

The spelling of 4921139 in words is "four million, nine hundred twenty-one thousand, one hundred thirty-nine".