38491138597 has 2 divisors, whose sum is σ = 38491138598. Its totient is φ = 38491138596.

The previous prime is 38491138579. The next prime is 38491138613. The reversal of 38491138597 is 79583119483.

Together with previous prime (38491138579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37050860196 + 1440278401 = 192486^2 + 37951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38491138597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38491138507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19245569298 + 19245569299.

It is an arithmetic number, because the mean of its divisors is an integer number (19245569299).

Almost surely, 2^38491138597 is an apocalyptic number.

It is an amenable number.

38491138597 is a deficient number, since it is larger than the sum of its proper divisors (1).

38491138597 is an equidigital number, since it uses as much as digits as its factorization.

38491138597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 58.

The spelling of 38491138597 in words is "thirty-eight billion, four hundred ninety-one million, one hundred thirty-eight thousand, five hundred ninety-seven".