38724689 has 2 divisors, whose sum is σ = 38724690. Its totient is φ = 38724688.

The previous prime is 38724661. The next prime is 38724703. The reversal of 38724689 is 98642783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34281025 + 4443664 = 5855^2 + 2108^2 .

It is a cyclic number.

It is not a de Polignac number, because 38724689 - 2¹² = 38720593 is a prime.

It is not a weakly prime, because it can be changed into another prime (38724659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19362344 + 19362345.

It is an arithmetic number, because the mean of its divisors is an integer number (19362345).

Almost surely, 2^38724689 is an apocalyptic number.

It is an amenable number.

38724689 is a deficient number, since it is larger than the sum of its proper divisors (1).

38724689 is an equidigital number, since it uses as much as digits as its factorization.

38724689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 38724689 is about 6222.9164384555. The cubic root of 38724689 is about 338.3212781477.

The spelling of 38724689 in words is "thirty-eight million, seven hundred twenty-four thousand, six hundred eighty-nine".