38086721 has 2 divisors, whose sum is σ = 38086722. Its totient is φ = 38086720.

The previous prime is 38086709. The next prime is 38086733. The reversal of 38086721 is 12768083.

It is a balanced prime because it is at equal distance from previous prime (38086709) and next prime (38086733).

It can be written as a sum of positive squares in only one way, i.e., 27615025 + 10471696 = 5255^2 + 3236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38086721 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (38086751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19043360 + 19043361.

It is an arithmetic number, because the mean of its divisors is an integer number (19043361).

Almost surely, 2^38086721 is an apocalyptic number.

It is an amenable number.

38086721 is a deficient number, since it is larger than the sum of its proper divisors (1).

38086721 is an equidigital number, since it uses as much as digits as its factorization.

38086721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 38086721 is about 6171.4439963432. The cubic root of 38086721 is about 336.4530953833.

The spelling of 38086721 in words is "thirty-eight million, eighty-six thousand, seven hundred twenty-one".