3720999949 has 2 divisors, whose sum is σ = 3720999950. Its totient is φ = 3720999948.

The previous prime is 3720999941. The next prime is 3721000037. The reversal of 3720999949 is 9499990273.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3715755849 + 5244100 = 60957^2 + 2290^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720999949 - 2³ = 3720999941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3720999941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860499974 + 1860499975.

It is an arithmetic number, because the mean of its divisors is an integer number (1860499975).

Almost surely, 2^3720999949 is an apocalyptic number.

It is an amenable number.

3720999949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3720999949 is an equidigital number, since it uses as much as digits as its factorization.

3720999949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9920232, while the sum is 61.

The square root of 3720999949 is about 60999.9995819672. Note that the first 3 decimals coincide. The cubic root of 3720999949 is about 1549.6010001775.

The spelling of 3720999949 in words is "three billion, seven hundred twenty million, nine hundred ninety-nine thousand, nine hundred forty-nine".