3672238781 has 2 divisors, whose sum is σ = 3672238782. Its totient is φ = 3672238780.

The previous prime is 3672238777. The next prime is 3672238837. The reversal of 3672238781 is 1878322763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3663880900 + 8357881 = 60530^2 + 2891^2 .

It is a cyclic number.

It is not a de Polignac number, because 3672238781 - 2² = 3672238777 is a prime.

It is a super-2 number, since 2×3672238781² = 26970675329360731922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3672238741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1836119390 + 1836119391.

It is an arithmetic number, because the mean of its divisors is an integer number (1836119391).

Almost surely, 2^3672238781 is an apocalyptic number.

It is an amenable number.

3672238781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3672238781 is an equidigital number, since it uses as much as digits as its factorization.

3672238781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 3672238781 is about 60598.9998349808. Note that the first 3 decimals coincide. The cubic root of 3672238781 is about 1542.8023944756.

The spelling of 3672238781 in words is "three billion, six hundred seventy-two million, two hundred thirty-eight thousand, seven hundred eighty-one".