139106437 has 2 divisors, whose sum is σ = 139106438. Its totient is φ = 139106436.

The previous prime is 139106389. The next prime is 139106453. The reversal of 139106437 is 734601931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104837121 + 34269316 = 10239^2 + 5854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139106437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139106477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69553218 + 69553219.

It is an arithmetic number, because the mean of its divisors is an integer number (69553219).

Almost surely, 2^139106437 is an apocalyptic number.

It is an amenable number.

139106437 is a deficient number, since it is larger than the sum of its proper divisors (1).

139106437 is an equidigital number, since it uses as much as digits as its factorization.

139106437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 139106437 is about 11794.3391930197. The cubic root of 139106437 is about 518.1423322991.

The spelling of 139106437 in words is "one hundred thirty-nine million, one hundred six thousand, four hundred thirty-seven".