3693223981 has 2 divisors, whose sum is σ = 3693223982. Its totient is φ = 3693223980.

The previous prime is 3693223949. The next prime is 3693223991. The reversal of 3693223981 is 1893223963.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2317555881 + 1375668100 = 48141^2 + 37090^2 .

It is a cyclic number.

It is not a de Polignac number, because 3693223981 - 2⁵ = 3693223949 is a prime.

It is a super-2 number, since 2×3693223981² = 27279806747666976722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3693223991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1846611990 + 1846611991.

It is an arithmetic number, because the mean of its divisors is an integer number (1846611991).

Almost surely, 2^3693223981 is an apocalyptic number.

It is an amenable number.

3693223981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3693223981 is an equidigital number, since it uses as much as digits as its factorization.

3693223981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The square root of 3693223981 is about 60771.9012455592. The cubic root of 3693223981 is about 1545.7356224333.

The spelling of 3693223981 in words is "three billion, six hundred ninety-three million, two hundred twenty-three thousand, nine hundred eighty-one".