3728706997 has 2 divisors, whose sum is σ = 3728706998. Its totient is φ = 3728706996.

The previous prime is 3728706913. The next prime is 3728707009. The reversal of 3728706997 is 7996078273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3726980401 + 1726596 = 61049^2 + 1314^2 .

It is a cyclic number.

It is not a de Polignac number, because 3728706997 - 2¹¹ = 3728704949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3728706907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1864353498 + 1864353499.

It is an arithmetic number, because the mean of its divisors is an integer number (1864353499).

Almost surely, 2^3728706997 is an apocalyptic number.

It is an amenable number.

3728706997 is a deficient number, since it is larger than the sum of its proper divisors (1).

3728706997 is an equidigital number, since it uses as much as digits as its factorization.

3728706997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8001504, while the sum is 58.

The square root of 3728706997 is about 61063.1394296101. The cubic root of 3728706997 is about 1550.6701225876.

The spelling of 3728706997 in words is "three billion, seven hundred twenty-eight million, seven hundred six thousand, nine hundred ninety-seven".