139906313 has 2 divisors, whose sum is σ = 139906314. Its totient is φ = 139906312.

The previous prime is 139906267. The next prime is 139906321. The reversal of 139906313 is 313609931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122832889 + 17073424 = 11083^2 + 4132^2 .

It is a cyclic number.

It is not a de Polignac number, because 139906313 - 2⁸ = 139906057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (139906343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69953156 + 69953157.

It is an arithmetic number, because the mean of its divisors is an integer number (69953157).

Almost surely, 2^139906313 is an apocalyptic number.

It is an amenable number.

139906313 is a deficient number, since it is larger than the sum of its proper divisors (1).

139906313 is an equidigital number, since it uses as much as digits as its factorization.

139906313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 139906313 is about 11828.1999053110. The cubic root of 139906313 is about 519.1335583401.

The spelling of 139906313 in words is "one hundred thirty-nine million, nine hundred six thousand, three hundred thirteen".