139949237 has 2 divisors, whose sum is σ = 139949238. Its totient is φ = 139949236.

The previous prime is 139949213. The next prime is 139949261. The reversal of 139949237 is 732949931.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (139949213) and next prime (139949261).

It can be written as a sum of positive squares in only one way, i.e., 134351281 + 5597956 = 11591^2 + 2366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139949237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139949191 and 139949200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139949267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69974618 + 69974619.

It is an arithmetic number, because the mean of its divisors is an integer number (69974619).

Almost surely, 2^139949237 is an apocalyptic number.

It is an amenable number.

139949237 is a deficient number, since it is larger than the sum of its proper divisors (1).

139949237 is an equidigital number, since it uses as much as digits as its factorization.

139949237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 47.

The square root of 139949237 is about 11830.0142434403. The cubic root of 139949237 is about 519.1866438892.

The spelling of 139949237 in words is "one hundred thirty-nine million, nine hundred forty-nine thousand, two hundred thirty-seven".