3722520913 has 8 divisors (see below), whose sum is σ = 3875830056. Its totient is φ = 3572188800.

The previous prime is 3722520899. The next prime is 3722520917. The reversal of 3722520913 is 3190252273.

3722520913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 244234384 + 3478286529 = 15628^2 + 58977^2 .

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 3722520913 - 2⁹ = 3722520401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3722520917) 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, 741706 + ... + 746707.

It is an arithmetic number, because the mean of its divisors is an integer number (484478757).

Almost surely, 2^3722520913 is an apocalyptic number.

It is an amenable number.

3722520913 is a deficient number, since it is larger than the sum of its proper divisors (153309143).

3722520913 is a wasteful number, since it uses less digits than its factorization.

3722520913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488515.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 3722520913 is about 61012.4652263781. The cubic root of 3722520913 is about 1549.8121052849.

The spelling of 3722520913 in words is "three billion, seven hundred twenty-two million, five hundred twenty thousand, nine hundred thirteen".