38142749 has 2 divisors, whose sum is σ = 38142750. Its totient is φ = 38142748.

The previous prime is 38142739. The next prime is 38142761. The reversal of 38142749 is 94724183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35485849 + 2656900 = 5957^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 38142749 - 2²⁰ = 37094173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38142739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19071374 + 19071375.

It is an arithmetic number, because the mean of its divisors is an integer number (19071375).

Almost surely, 2^38142749 is an apocalyptic number.

It is an amenable number.

38142749 is a deficient number, since it is larger than the sum of its proper divisors (1).

38142749 is an equidigital number, since it uses as much as digits as its factorization.

38142749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 38142749 is about 6175.9816223820. The cubic root of 38142749 is about 336.6179958833.

The spelling of 38142749 in words is "thirty-eight million, one hundred forty-two thousand, seven hundred forty-nine".