38166749 has 2 divisors, whose sum is σ = 38166750. Its totient is φ = 38166748.

The previous prime is 38166727. The next prime is 38166761. The reversal of 38166749 is 94766183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23863225 + 14303524 = 4885^2 + 3782^2 .

It is an emirp because it is prime and its reverse (94766183) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38166749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38165749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19083374 + 19083375.

It is an arithmetic number, because the mean of its divisors is an integer number (19083375).

Almost surely, 2^38166749 is an apocalyptic number.

It is an amenable number.

38166749 is a deficient number, since it is larger than the sum of its proper divisors (1).

38166749 is an equidigital number, since it uses as much as digits as its factorization.

38166749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 38166749 is about 6177.9243277981. The cubic root of 38166749 is about 336.6885828079.

The spelling of 38166749 in words is "thirty-eight million, one hundred sixty-six thousand, seven hundred forty-nine".