40233979 has 2 divisors, whose sum is σ = 40233980. Its totient is φ = 40233978.

The previous prime is 40233961. The next prime is 40233983. The reversal of 40233979 is 97933204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40233979 - 2²³ = 31845371 is a prime.

It is equal to p_2446984 and since 40233979 and 2446984 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40233379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20116989 + 20116990.

It is an arithmetic number, because the mean of its divisors is an integer number (20116990).

Almost surely, 2^40233979 is an apocalyptic number.

40233979 is a deficient number, since it is larger than the sum of its proper divisors (1).

40233979 is an equidigital number, since it uses as much as digits as its factorization.

40233979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 40233979 is about 6343.0260128743. The cubic root of 40233979 is about 342.6607241110.

The spelling of 40233979 in words is "forty million, two hundred thirty-three thousand, nine hundred seventy-nine".