139991659 has 2 divisors, whose sum is σ = 139991660. Its totient is φ = 139991658.

The previous prime is 139991653. The next prime is 139991689. The reversal of 139991659 is 956199931.

It is a weak prime.

It is an emirp because it is prime and its reverse (956199931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139991659 - 2⁵ = 139991627 is a prime.

It is a super-3 number, since 3×139991659³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (139991653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69995829 + 69995830.

It is an arithmetic number, because the mean of its divisors is an integer number (69995830).

Almost surely, 2^139991659 is an apocalyptic number.

139991659 is a deficient number, since it is larger than the sum of its proper divisors (1).

139991659 is an equidigital number, since it uses as much as digits as its factorization.

139991659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 590490, while the sum is 52.

The square root of 139991659 is about 11831.8070893672. The cubic root of 139991659 is about 519.2390979343.

The spelling of 139991659 in words is "one hundred thirty-nine million, nine hundred ninety-one thousand, six hundred fifty-nine".