139210937 has 2 divisors, whose sum is σ = 139210938. Its totient is φ = 139210936.

The previous prime is 139210919. The next prime is 139210957. The reversal of 139210937 is 739012931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123298816 + 15912121 = 11104^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 139210937 - 2⁶ = 139210873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139210897 and 139210906.

It is not a weakly prime, because it can be changed into another prime (139210957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69605468 + 69605469.

It is an arithmetic number, because the mean of its divisors is an integer number (69605469).

Almost surely, 2^139210937 is an apocalyptic number.

It is an amenable number.

139210937 is a deficient number, since it is larger than the sum of its proper divisors (1).

139210937 is an equidigital number, since it uses as much as digits as its factorization.

139210937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 139210937 is about 11798.7684526818. The cubic root of 139210937 is about 518.2720466914.

The spelling of 139210937 in words is "one hundred thirty-nine million, two hundred ten thousand, nine hundred thirty-seven".