139303949 has 2 divisors, whose sum is σ = 139303950. Its totient is φ = 139303948.

The previous prime is 139303909. The next prime is 139303951. The reversal of 139303949 is 949303931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102313225 + 36990724 = 10115^2 + 6082^2 .

It is a cyclic number.

It is not a de Polignac number, because 139303949 - 2⁸ = 139303693 is a prime.

Together with 139303951, 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 (139303909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69651974 + 69651975.

It is an arithmetic number, because the mean of its divisors is an integer number (69651975).

Almost surely, 2^139303949 is an apocalyptic number.

It is an amenable number.

139303949 is a deficient number, since it is larger than the sum of its proper divisors (1).

139303949 is an equidigital number, since it uses as much as digits as its factorization.

139303949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 41.

The square root of 139303949 is about 11802.7093923387. The cubic root of 139303949 is about 518.3874465986.

The spelling of 139303949 in words is "one hundred thirty-nine million, three hundred three thousand, nine hundred forty-nine".