3731812993 has 2 divisors, whose sum is σ = 3731812994. Its totient is φ = 3731812992.

The previous prime is 3731812991. The next prime is 3731813011. The reversal of 3731812993 is 3992181373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3716975089 + 14837904 = 60967^2 + 3852^2 .

It is a cyclic number.

It is not a de Polignac number, because 3731812993 - 2¹ = 3731812991 is a prime.

Together with 3731812991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3731812991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1865906496 + 1865906497.

It is an arithmetic number, because the mean of its divisors is an integer number (1865906497).

Almost surely, 2^3731812993 is an apocalyptic number.

It is an amenable number.

3731812993 is a deficient number, since it is larger than the sum of its proper divisors (1).

3731812993 is an equidigital number, since it uses as much as digits as its factorization.

3731812993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 3731812993 is about 61088.5667944502. The cubic root of 3731812993 is about 1551.1005701468.

The spelling of 3731812993 in words is "three billion, seven hundred thirty-one million, eight hundred twelve thousand, nine hundred ninety-three".