70999 has 2 divisors, whose sum is σ = 71000. Its totient is φ = 70998.

The previous prime is 70997. The next prime is 71011. The reversal of 70999 is 99907.

It is a weak prime.

It is an emirp because it is prime and its reverse (99907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70999 - 2¹ = 70997 is a prime.

Together with 70997, it forms a pair of twin primes.

70999 is a modest number, since divided by 999 gives 70 as remainder.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35499 + 35500.

It is an arithmetic number, because the mean of its divisors is an integer number (35500).

2⁷⁰⁹⁹⁹ is an apocalyptic number.

70999 is a deficient number, since it is larger than the sum of its proper divisors (1).

70999 is an equidigital number, since it uses as much as digits as its factorization.

70999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 70999 is about 266.4563754163. The cubic root of 70999 is about 41.4079830887.

It can be divided in two parts, 709 and 99, that added together give a palindrome (808).

The spelling of 70999 in words is "seventy thousand, nine hundred ninety-nine".