3720138811 has 4 divisors (see below), whose sum is σ = 3722542000. Its totient is φ = 3717735624.

The previous prime is 3720138803. The next prime is 3720138823. The reversal of 3720138811 is 1188310273.

3720138811 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3720138811 - 2³ = 3720138803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3720138881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199271 + ... + 1202368.

It is an arithmetic number, because the mean of its divisors is an integer number (930635500).

Almost surely, 2^3720138811 is an apocalyptic number.

3720138811 is a deficient number, since it is larger than the sum of its proper divisors (2403189).

3720138811 is a wasteful number, since it uses less digits than its factorization.

3720138811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403188.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 3720138811 is about 60992.9406652934. The cubic root of 3720138811 is about 1549.4814513754.

The spelling of 3720138811 in words is "three billion, seven hundred twenty million, one hundred thirty-eight thousand, eight hundred eleven".