38356561 has 2 divisors, whose sum is σ = 38356562. Its totient is φ = 38356560.

The previous prime is 38356553. The next prime is 38356601. The reversal of 38356561 is 16565383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27499536 + 10857025 = 5244^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 38356561 - 2³ = 38356553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38356561.

It is not a weakly prime, because it can be changed into another prime (38356501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19178280 + 19178281.

It is an arithmetic number, because the mean of its divisors is an integer number (19178281).

Almost surely, 2^38356561 is an apocalyptic number.

It is an amenable number.

38356561 is a deficient number, since it is larger than the sum of its proper divisors (1).

38356561 is an equidigital number, since it uses as much as digits as its factorization.

38356561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 38356561 is about 6193.2673929034. The cubic root of 38356561 is about 337.2458032893.

The spelling of 38356561 in words is "thirty-eight million, three hundred fifty-six thousand, five hundred sixty-one".