40699 has 2 divisors, whose sum is σ = 40700. Its totient is φ = 40698.

The previous prime is 40697. The next prime is 40709. The reversal of 40699 is 99604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40699 - 2¹ = 40697 is a prime.

Together with 40697, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20349 + 20350.

It is an arithmetic number, because the mean of its divisors is an integer number (20350).

2⁴⁰⁶⁹⁹ is an apocalyptic number.

40699 is a deficient number, since it is larger than the sum of its proper divisors (1).

40699 is an equidigital number, since it uses as much as digits as its factorization.

40699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 40699 is about 201.7399315951. The cubic root of 40699 is about 34.3975818563.

It can be divided in two parts, 406 and 99, that added together give a palindrome (505).

The spelling of 40699 in words is "forty thousand, six hundred ninety-nine".