38721343250437 has 2 divisors, whose sum is σ = 38721343250438. Its totient is φ = 38721343250436.

The previous prime is 38721343250411. The next prime is 38721343250483. The reversal of 38721343250437 is 73405234312783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34181690873121 + 4539652377316 = 5846511^2 + 2130646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38721343250437 is a prime.

It is a super-3 number, since 3×38721343250437³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38721343257437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19360671625218 + 19360671625219.

It is an arithmetic number, because the mean of its divisors is an integer number (19360671625219).

Almost surely, 2^{38721343250437} is an apocalyptic number.

It is an amenable number.

38721343250437 is a deficient number, since it is larger than the sum of its proper divisors (1).

38721343250437 is an equidigital number, since it uses as much as digits as its factorization.

38721343250437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 52.

The spelling of 38721343250437 in words is "thirty-eight trillion, seven hundred twenty-one billion, three hundred forty-three million, two hundred fifty thousand, four hundred thirty-seven".