38992729 has 2 divisors, whose sum is σ = 38992730. Its totient is φ = 38992728.

The previous prime is 38992673. The next prime is 38992753. The reversal of 38992729 is 92729983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27248400 + 11744329 = 5220^2 + 3427^2 .

It is an emirp because it is prime and its reverse (92729983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38992729 - 2¹⁵ = 38959961 is a prime.

It is not a weakly prime, because it can be changed into another prime (38992799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19496364 + 19496365.

It is an arithmetic number, because the mean of its divisors is an integer number (19496365).

Almost surely, 2^38992729 is an apocalyptic number.

It is an amenable number.

38992729 is a deficient number, since it is larger than the sum of its proper divisors (1).

38992729 is an equidigital number, since it uses as much as digits as its factorization.

38992729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 38992729 is about 6244.4158253595. The cubic root of 38992729 is about 339.1000682066.

The spelling of 38992729 in words is "thirty-eight million, nine hundred ninety-two thousand, seven hundred twenty-nine".