38404137432989 has 2 divisors, whose sum is σ = 38404137432990. Its totient is φ = 38404137432988.

The previous prime is 38404137432979. The next prime is 38404137433069. The reversal of 38404137432989 is 98923473140483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26160667562500 + 12243469870489 = 5114750^2 + 3499067^2 .

It is a cyclic number.

It is not a de Polignac number, because 38404137432989 - 2¹² = 38404137428893 is a prime.

It is a super-4 number, since 4×38404137432989⁴ (a number of 55 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38404137432949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19202068716494 + 19202068716495.

It is an arithmetic number, because the mean of its divisors is an integer number (19202068716495).

Almost surely, 2^{38404137432989} is an apocalyptic number.

It is an amenable number.

38404137432989 is a deficient number, since it is larger than the sum of its proper divisors (1).

38404137432989 is an equidigital number, since it uses as much as digits as its factorization.

38404137432989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125411328, while the sum is 65.

The spelling of 38404137432989 in words is "thirty-eight trillion, four hundred four billion, one hundred thirty-seven million, four hundred thirty-two thousand, nine hundred eighty-nine".