40723971 has 4 divisors (see below), whose sum is σ = 54298632. Its totient is φ = 27149312.

The previous prime is 40723951. The next prime is 40723979. The reversal of 40723971 is 17932704.

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 40723971 - 2⁷ = 40723843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40723979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6787326 + ... + 6787331.

It is an arithmetic number, because the mean of its divisors is an integer number (13574658).

Almost surely, 2^40723971 is an apocalyptic number.

40723971 is a deficient number, since it is larger than the sum of its proper divisors (13574661).

40723971 is a wasteful number, since it uses less digits than its factorization.

40723971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13574660.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 40723971 is about 6381.5335931107. The cubic root of 40723971 is about 344.0461533307.

The spelling of 40723971 in words is "forty million, seven hundred twenty-three thousand, nine hundred seventy-one".