38388761 has 2 divisors, whose sum is σ = 38388762. Its totient is φ = 38388760.

The previous prime is 38388743. The next prime is 38388769. The reversal of 38388761 is 16788383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36481600 + 1907161 = 6040^2 + 1381^2 .

It is an emirp because it is prime and its reverse (16788383) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38388761 is a prime.

It is a super-2 number, since 2×38388761² = 2947393942230242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38388769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19194380 + 19194381.

It is an arithmetic number, because the mean of its divisors is an integer number (19194381).

Almost surely, 2^38388761 is an apocalyptic number.

It is an amenable number.

38388761 is a deficient number, since it is larger than the sum of its proper divisors (1).

38388761 is an equidigital number, since it uses as much as digits as its factorization.

38388761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 38388761 is about 6195.8664446549. The cubic root of 38388761 is about 337.3401485350.

The spelling of 38388761 in words is "thirty-eight million, three hundred eighty-eight thousand, seven hundred sixty-one".