6139949 has 2 divisors, whose sum is σ = 6139950. Its totient is φ = 6139948.

The previous prime is 6139937. The next prime is 6139951. The reversal of 6139949 is 9499316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5175625 + 964324 = 2275^2 + 982^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6139949 is a prime.

Together with 6139951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6139979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3069974 + 3069975.

It is an arithmetic number, because the mean of its divisors is an integer number (3069975).

Almost surely, 2^6139949 is an apocalyptic number.

It is an amenable number.

6139949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6139949 is an equidigital number, since it uses as much as digits as its factorization.

6139949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 6139949 is about 2477.8920476889. The cubic root of 6139949 is about 183.1140161614.

The spelling of 6139949 in words is "six million, one hundred thirty-nine thousand, nine hundred forty-nine".