3703742821 has 8 divisors (see below), whose sum is σ = 3741805944. Its totient is φ = 3665707200.

The previous prime is 3703742813. The next prime is 3703742837. The reversal of 3703742821 is 1282473073.

It can be written as a sum of positive squares in 4 ways, for example, as 1288020321 + 2415722500 = 35889^2 + 49150^2 .

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 3703742821 - 2³ = 3703742813 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 (3703749821) 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, 366391 + ... + 376363.

It is an arithmetic number, because the mean of its divisors is an integer number (467725743).

Almost surely, 2^3703742821 is an apocalyptic number.

It is an amenable number.

3703742821 is a deficient number, since it is larger than the sum of its proper divisors (38063123).

3703742821 is a wasteful number, since it uses less digits than its factorization.

3703742821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 3703742821 is about 60858.3833255534. The cubic root of 3703742821 is about 1547.2017248439.

The spelling of 3703742821 in words is "three billion, seven hundred three million, seven hundred forty-two thousand, eight hundred twenty-one".