40001679 has 12 divisors (see below), whose sum is σ = 57887856. Its totient is φ = 26618112.

The previous prime is 40001657. The next prime is 40001711. The reversal of 40001679 is 97610004.

It is not a de Polignac number, because 40001679 - 2¹⁵ = 39968911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1342 + ... + 9044.

It is an arithmetic number, because the mean of its divisors is an integer number (4823988).

Almost surely, 2^40001679 is an apocalyptic number.

40001679 is a deficient number, since it is larger than the sum of its proper divisors (17886177).

40001679 is a wasteful number, since it uses less digits than its factorization.

40001679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8286 (or 8283 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 40001679 is about 6324.6880555487. The cubic root of 40001679 is about 341.9999743511. Note that the first 4 decimals are identical.

The spelling of 40001679 in words is "forty million, one thousand, six hundred seventy-nine".