6139993 has 2 divisors, whose sum is σ = 6139994. Its totient is φ = 6139992.

The previous prime is 6139979. The next prime is 6139999. The reversal of 6139993 is 3999316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5745609 + 394384 = 2397^2 + 628^2 .

It is a cyclic number.

It is not a de Polignac number, because 6139993 - 2⁵ = 6139961 is a prime.

It is not a weakly prime, because it can be changed into another prime (6139999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3069996 + 3069997.

It is an arithmetic number, because the mean of its divisors is an integer number (3069997).

Almost surely, 2^6139993 is an apocalyptic number.

It is an amenable number.

6139993 is a deficient number, since it is larger than the sum of its proper divisors (1).

6139993 is an equidigital number, since it uses as much as digits as its factorization.

6139993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39366, while the sum is 40.

The square root of 6139993 is about 2477.9009261873. The cubic root of 6139993 is about 183.1144535699.

The spelling of 6139993 in words is "six million, one hundred thirty-nine thousand, nine hundred ninety-three".