73803731381 has 2 divisors, whose sum is σ = 73803731382. Its totient is φ = 73803731380.

The previous prime is 73803731311. The next prime is 73803731459. The reversal of 73803731381 is 18313730837.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47408530225 + 26395201156 = 217735^2 + 162466^2 .

It is a cyclic number.

It is not a de Polignac number, because 73803731381 - 2¹⁴ = 73803714997 is a prime.

It is a super-2 number, since 2×73803731381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73803731311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36901865690 + 36901865691.

It is an arithmetic number, because the mean of its divisors is an integer number (36901865691).

Almost surely, 2^73803731381 is an apocalyptic number.

It is an amenable number.

73803731381 is a deficient number, since it is larger than the sum of its proper divisors (1).

73803731381 is an equidigital number, since it uses as much as digits as its factorization.

73803731381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 73803731381 in words is "seventy-three billion, eight hundred three million, seven hundred thirty-one thousand, three hundred eighty-one".