139837 has 2 divisors, whose sum is σ = 139838. Its totient is φ = 139836.
The previous prime is 139831. The next prime is 139861. The reversal of 139837 is 738931.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 109561 + 30276 = 331^2 + 174^2 .
It is a cyclic number.
It is not a de Polignac number, because 139837 - 27 = 139709 is a prime.
It is a plaindrome in base 16.
It is a junction number, because it is equal to n+sod(n) for n = 139799 and 139808.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139837.
It is not a weakly prime, because it can be changed into another prime (139831) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69918 + 69919.
It is an arithmetic number, because the mean of its divisors is an integer number (69919).
2139837 is an apocalyptic number.
It is an amenable number.
139837 is a deficient number, since it is larger than the sum of its proper divisors (1).
139837 is an equidigital number, since it uses as much as digits as its factorization.
139837 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 139837 is about 373.9478573277. The cubic root of 139837 is about 51.9047813703.
The spelling of 139837 in words is "one hundred thirty-nine thousand, eight hundred thirty-seven".
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