40193971 has 8 divisors (see below), whose sum is σ = 41655600. Its totient is φ = 38737440.

The previous prime is 40193957. The next prime is 40193983. The reversal of 40193971 is 17939104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40193971 - 2⁷ = 40193843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40193941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22665 + ... + 24373.

It is an arithmetic number, because the mean of its divisors is an integer number (5206950).

Almost surely, 2^40193971 is an apocalyptic number.

40193971 is a deficient number, since it is larger than the sum of its proper divisors (1461629).

40193971 is a wasteful number, since it uses less digits than its factorization.

40193971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 40193971 is about 6339.8715286668. The cubic root of 40193971 is about 342.5471077336.

The spelling of 40193971 in words is "forty million, one hundred ninety-three thousand, nine hundred seventy-one".