37798729393 has 2 divisors, whose sum is σ = 37798729394. Its totient is φ = 37798729392.

The previous prime is 37798729357. The next prime is 37798729403. The reversal of 37798729393 is 39392789773.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35041219249 + 2757510144 = 187193^2 + 52512^2 .

It is a cyclic number.

It is not a de Polignac number, because 37798729393 - 2²⁵ = 37765174961 is a prime.

It is not a weakly prime, because it can be changed into another prime (37798729093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18899364696 + 18899364697.

It is an arithmetic number, because the mean of its divisors is an integer number (18899364697).

Almost surely, 2^37798729393 is an apocalyptic number.

It is an amenable number.

37798729393 is a deficient number, since it is larger than the sum of its proper divisors (1).

37798729393 is an equidigital number, since it uses as much as digits as its factorization.

37798729393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108020304, while the sum is 67.

The spelling of 37798729393 in words is "thirty-seven billion, seven hundred ninety-eight million, seven hundred twenty-nine thousand, three hundred ninety-three".