40721743 has 8 divisors (see below), whose sum is σ = 41350320. Its totient is φ = 40098240.

The previous prime is 40721717. The next prime is 40721761. The reversal of 40721743 is 34712704.

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 40721743 - 2⁵ = 40721711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40721243) 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, 16813 + ... + 19081.

It is an arithmetic number, because the mean of its divisors is an integer number (5168790).

Almost surely, 2^40721743 is an apocalyptic number.

40721743 is a deficient number, since it is larger than the sum of its proper divisors (628577).

40721743 is a wasteful number, since it uses less digits than its factorization.

40721743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 40721743 is about 6381.3590245339. The cubic root of 40721743 is about 344.0398789850.

The spelling of 40721743 in words is "forty million, seven hundred twenty-one thousand, seven hundred forty-three".