2031720349 has 2 divisors, whose sum is σ = 2031720350. Its totient is φ = 2031720348.

The previous prime is 2031720329. The next prime is 2031720389. The reversal of 2031720349 is 9430271302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089660100 + 942060249 = 33010^2 + 30693^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031720349 - 2¹¹ = 2031718301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2031720349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031720329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015860174 + 1015860175.

It is an arithmetic number, because the mean of its divisors is an integer number (1015860175).

Almost surely, 2^2031720349 is an apocalyptic number.

It is an amenable number.

2031720349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031720349 is an equidigital number, since it uses as much as digits as its factorization.

2031720349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 2031720349 is about 45074.6086949183. The cubic root of 2031720349 is about 1266.5469987209.

The spelling of 2031720349 in words is "two billion, thirty-one million, seven hundred twenty thousand, three hundred forty-nine".