1986972201 has 10 divisors (see below), whose sum is σ = 2968193162. Its totient is φ = 1324648080.

The previous prime is 1986972199. The next prime is 1986972203. The reversal of 1986972201 is 1022796891.

It is an interprime number because it is at equal distance from previous prime (1986972199) and next prime (1986972203).

It can be written as a sum of positive squares in only one way, i.e., 1651203225 + 335768976 = 40635^2 + 18324^2 .

It is not a de Polignac number, because 1986972201 - 2¹ = 1986972199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1986972203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12265180 + ... + 12265341.

Almost surely, 2^1986972201 is an apocalyptic number.

It is an amenable number.

1986972201 is a deficient number, since it is larger than the sum of its proper divisors (981220961).

1986972201 is an equidigital number, since it uses as much as digits as its factorization.

1986972201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24530533 (or 24530524 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 1986972201 is about 44575.4663576277. The cubic root of 1986972201 is about 1257.1794219878.

The spelling of 1986972201 in words is "one billion, nine hundred eighty-six million, nine hundred seventy-two thousand, two hundred one".