3675209981 has 2 divisors, whose sum is σ = 3675209982. Its totient is φ = 3675209980.

The previous prime is 3675209969. The next prime is 3675210013. The reversal of 3675209981 is 1899025763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3218746756 + 456463225 = 56734^2 + 21365^2 .

It is a cyclic number.

It is not a de Polignac number, because 3675209981 - 2²⁶ = 3608101117 is a prime.

It is a super-2 number, since 2×3675209981² = 27014336808884040722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3675209911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1837604990 + 1837604991.

It is an arithmetic number, because the mean of its divisors is an integer number (1837604991).

Almost surely, 2^3675209981 is an apocalyptic number.

It is an amenable number.

3675209981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3675209981 is an equidigital number, since it uses as much as digits as its factorization.

3675209981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 3675209981 is about 60623.5101342705. The cubic root of 3675209981 is about 1543.2183749359.

The spelling of 3675209981 in words is "three billion, six hundred seventy-five million, two hundred nine thousand, nine hundred eighty-one".