40102979 has 4 divisors (see below), whose sum is σ = 45831984. Its totient is φ = 34373976.

The previous prime is 40102973. The next prime is 40102999. The reversal of 40102979 is 97920104.

40102979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40102979 - 2⁴ = 40102963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40102973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2864492 + ... + 2864505.

It is an arithmetic number, because the mean of its divisors is an integer number (11457996).

Almost surely, 2^40102979 is an apocalyptic number.

40102979 is a deficient number, since it is larger than the sum of its proper divisors (5729005).

40102979 is an equidigital number, since it uses as much as digits as its factorization.

40102979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5729004.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 40102979 is about 6332.6912920180. The cubic root of 40102979 is about 342.2884238592.

The spelling of 40102979 in words is "forty million, one hundred two thousand, nine hundred seventy-nine".