40386979 has 2 divisors, whose sum is σ = 40386980. Its totient is φ = 40386978.

The previous prime is 40386977. The next prime is 40387003. The reversal of 40386979 is 97968304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40386979 - 2¹ = 40386977 is a prime.

It is a super-2 number, since 2×40386979² = 3262216145492882, which contains 22 as substring.

Together with 40386977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40386977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20193489 + 20193490.

It is an arithmetic number, because the mean of its divisors is an integer number (20193490).

Almost surely, 2^40386979 is an apocalyptic number.

40386979 is a deficient number, since it is larger than the sum of its proper divisors (1).

40386979 is an equidigital number, since it uses as much as digits as its factorization.

40386979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 40386979 is about 6355.0750585654. The cubic root of 40386979 is about 343.0945263872.

The spelling of 40386979 in words is "forty million, three hundred eighty-six thousand, nine hundred seventy-nine".