38975557 has 2 divisors, whose sum is σ = 38975558. Its totient is φ = 38975556.

The previous prime is 38975537. The next prime is 38975561. The reversal of 38975557 is 75557983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34644996 + 4330561 = 5886^2 + 2081^2 .

It is an emirp because it is prime and its reverse (75557983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38975557 - 2⁷ = 38975429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38975557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38975527) 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, 19487778 + 19487779.

It is an arithmetic number, because the mean of its divisors is an integer number (19487779).

Almost surely, 2^38975557 is an apocalyptic number.

It is an amenable number.

38975557 is a deficient number, since it is larger than the sum of its proper divisors (1).

38975557 is an equidigital number, since it uses as much as digits as its factorization.

38975557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1323000, while the sum is 49.

The square root of 38975557 is about 6243.0406854353. The cubic root of 38975557 is about 339.0502821608.

The spelling of 38975557 in words is "thirty-eight million, nine hundred seventy-five thousand, five hundred fifty-seven".