40002379 has 2 divisors, whose sum is σ = 40002380. Its totient is φ = 40002378.

The previous prime is 40002371. The next prime is 40002421. The reversal of 40002379 is 97320004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40002379 - 2³ = 40002371 is a prime.

It is not a weakly prime, because it can be changed into another prime (40002371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20001189 + 20001190.

It is an arithmetic number, because the mean of its divisors is an integer number (20001190).

Almost surely, 2^40002379 is an apocalyptic number.

40002379 is a deficient number, since it is larger than the sum of its proper divisors (1).

40002379 is an equidigital number, since it uses as much as digits as its factorization.

40002379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 40002379 is about 6324.7433940042. The cubic root of 40002379 is about 342.0019692556.

The spelling of 40002379 in words is "forty million, two thousand, three hundred seventy-nine".