139787 has 2 divisors, whose sum is σ = 139788. Its totient is φ = 139786.

The previous prime is 139759. The next prime is 139801. The reversal of 139787 is 787931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139787 - 2¹⁰ = 138763 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139787.

It is not a weakly prime, because it can be changed into another prime (139747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69893 + 69894.

It is an arithmetic number, because the mean of its divisors is an integer number (69894).

2¹³⁹⁷⁸⁷ is an apocalyptic number.

139787 is a deficient number, since it is larger than the sum of its proper divisors (1).

139787 is an equidigital number, since it uses as much as digits as its factorization.

139787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 35.

The square root of 139787 is about 373.8809971100. The cubic root of 139787 is about 51.8985942895.

The spelling of 139787 in words is "one hundred thirty-nine thousand, seven hundred eighty-seven".