139412137 has 2 divisors, whose sum is σ = 139412138. Its totient is φ = 139412136.

The previous prime is 139412129. The next prime is 139412153. The reversal of 139412137 is 731214931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97693456 + 41718681 = 9884^2 + 6459^2 .

It is a cyclic number.

It is not a de Polignac number, because 139412137 - 2³ = 139412129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139412099 and 139412108.

It is not a weakly prime, because it can be changed into another prime (139412197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69706068 + 69706069.

It is an arithmetic number, because the mean of its divisors is an integer number (69706069).

Almost surely, 2^139412137 is an apocalyptic number.

It is an amenable number.

139412137 is a deficient number, since it is larger than the sum of its proper divisors (1).

139412137 is an equidigital number, since it uses as much as digits as its factorization.

139412137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 139412137 is about 11807.2916877665. The cubic root of 139412137 is about 518.5216107507.

It can be divided in two parts, 1394 and 12137, that added together give a palindrome (13531).

The spelling of 139412137 in words is "one hundred thirty-nine million, four hundred twelve thousand, one hundred thirty-seven".