40720673 has 4 divisors (see below), whose sum is σ = 46537920. Its totient is φ = 34903428.

The previous prime is 40720663. The next prime is 40720681. The reversal of 40720673 is 37602704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40720673 - 2¹⁰ = 40719649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40720633) 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, 2908613 + ... + 2908626.

It is an arithmetic number, because the mean of its divisors is an integer number (11634480).

Almost surely, 2^40720673 is an apocalyptic number.

It is an amenable number.

40720673 is a deficient number, since it is larger than the sum of its proper divisors (5817247).

40720673 is an equidigital number, since it uses as much as digits as its factorization.

40720673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5817246.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 40720673 is about 6381.2751860424. The cubic root of 40720673 is about 344.0368656407.

The spelling of 40720673 in words is "forty million, seven hundred twenty thousand, six hundred seventy-three".