3633772381 has 2 divisors, whose sum is σ = 3633772382. Its totient is φ = 3633772380.

The previous prime is 3633772343. The next prime is 3633772411. The reversal of 3633772381 is 1832773363.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2184066756 + 1449705625 = 46734^2 + 38075^2 .

It is an emirp because it is prime and its reverse (1832773363) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3633772381 - 2¹⁷ = 3633641309 is a prime.

It is a super-2 number, since 2×3633772381² = 26408603433836818322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3633779381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1816886190 + 1816886191.

It is an arithmetic number, because the mean of its divisors is an integer number (1816886191).

Almost surely, 2^3633772381 is an apocalyptic number.

It is an amenable number.

3633772381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3633772381 is an equidigital number, since it uses as much as digits as its factorization.

3633772381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 43.

The square root of 3633772381 is about 60280.7795321195. The cubic root of 3633772381 is about 1537.3965655933.

The spelling of 3633772381 in words is "three billion, six hundred thirty-three million, seven hundred seventy-two thousand, three hundred eighty-one".