40721937 has 16 divisors (see below), whose sum is σ = 56859648. Its totient is φ = 25874640.

The previous prime is 40721929. The next prime is 40721969. The reversal of 40721937 is 73912704.

40721937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40721937 - 2³ = 40721929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40721898 and 40721907.

It is not an unprimeable number, because it can be changed into a prime (40721917) 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 15 ways as a sum of consecutive naturals, for example, 21948 + ... + 23730.

It is an arithmetic number, because the mean of its divisors is an integer number (3553728).

Almost surely, 2^40721937 is an apocalyptic number.

It is an amenable number.

40721937 is a deficient number, since it is larger than the sum of its proper divisors (16137711).

40721937 is a wasteful number, since it uses less digits than its factorization.

40721937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140.

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

The square root of 40721937 is about 6381.3742250396. The cubic root of 40721937 is about 344.0404253240.

The spelling of 40721937 in words is "forty million, seven hundred twenty-one thousand, nine hundred thirty-seven".