40392971 has 4 divisors (see below), whose sum is σ = 40539072. Its totient is φ = 40246872.

The previous prime is 40392967. The next prime is 40392977. The reversal of 40392971 is 17929304.

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

It is a cyclic number.

It is not a de Polignac number, because 40392971 - 2² = 40392967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40392977) 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 3 ways as a sum of consecutive naturals, for example, 72635 + ... + 73188.

It is an arithmetic number, because the mean of its divisors is an integer number (10134768).

Almost surely, 2^40392971 is an apocalyptic number.

40392971 is a deficient number, since it is larger than the sum of its proper divisors (146101).

40392971 is a wasteful number, since it uses less digits than its factorization.

40392971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146100.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 40392971 is about 6355.5464753237. The cubic root of 40392971 is about 343.1114932479. Note that the first 3 decimals are identical.

The spelling of 40392971 in words is "forty million, three hundred ninety-two thousand, nine hundred seventy-one".