38987797 has 2 divisors, whose sum is σ = 38987798. Its totient is φ = 38987796.

The previous prime is 38987789. The next prime is 38987813. The reversal of 38987797 is 79778983.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25745476 + 13242321 = 5074^2 + 3639^2 .

It is a cyclic number.

It is not a de Polignac number, because 38987797 - 2³ = 38987789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38987777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19493898 + 19493899.

It is an arithmetic number, because the mean of its divisors is an integer number (19493899).

Almost surely, 2^38987797 is an apocalyptic number.

It is an amenable number.

38987797 is a deficient number, since it is larger than the sum of its proper divisors (1).

38987797 is an equidigital number, since it uses as much as digits as its factorization.

38987797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 58.

The square root of 38987797 is about 6244.0209000291. The cubic root of 38987797 is about 339.0857705662.

It can be divided in two parts, 3898 and 7797, that multiplied together give a triangular number (30392706 = T₇₇₉₆).

The spelling of 38987797 in words is "thirty-eight million, nine hundred eighty-seven thousand, seven hundred ninety-seven".