40196879 has 2 divisors, whose sum is σ = 40196880. Its totient is φ = 40196878.

The previous prime is 40196861. The next prime is 40196881. The reversal of 40196879 is 97869104.

40196879 is nontrivially palindromic in base 13.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40196879 - 2⁸ = 40196623 is a prime.

Together with 40196881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40190879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20098439 + 20098440.

It is an arithmetic number, because the mean of its divisors is an integer number (20098440).

Almost surely, 2^40196879 is an apocalyptic number.

40196879 is a deficient number, since it is larger than the sum of its proper divisors (1).

40196879 is an equidigital number, since it uses as much as digits as its factorization.

40196879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 40196879 is about 6340.1008667055. The cubic root of 40196879 is about 342.5553685328. Note that the first 3 decimals are identical.

The spelling of 40196879 in words is "forty million, one hundred ninety-six thousand, eight hundred seventy-nine".