139901393 has 2 divisors, whose sum is σ = 139901394. Its totient is φ = 139901392.

The previous prime is 139901371. The next prime is 139901401. The reversal of 139901393 is 393109931.

139901393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132894784 + 7006609 = 11528^2 + 2647^2 .

It is a cyclic number.

It is not a de Polignac number, because 139901393 - 2¹⁸ = 139639249 is a prime.

It is not a weakly prime, because it can be changed into another prime (139901303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69950696 + 69950697.

It is an arithmetic number, because the mean of its divisors is an integer number (69950697).

Almost surely, 2^139901393 is an apocalyptic number.

It is an amenable number.

139901393 is a deficient number, since it is larger than the sum of its proper divisors (1).

139901393 is an equidigital number, since it uses as much as digits as its factorization.

139901393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 38.

The square root of 139901393 is about 11827.9919259357. The cubic root of 139901393 is about 519.1274729176.

The spelling of 139901393 in words is "one hundred thirty-nine million, nine hundred one thousand, three hundred ninety-three".