38947351 has 2 divisors, whose sum is σ = 38947352. Its totient is φ = 38947350.

The previous prime is 38947297. The next prime is 38947361. The reversal of 38947351 is 15374983.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38947351 is a prime.

It is a super-2 number, since 2×38947351² = 3033792299834402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38947361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19473675 + 19473676.

It is an arithmetic number, because the mean of its divisors is an integer number (19473676).

Almost surely, 2^38947351 is an apocalyptic number.

38947351 is a deficient number, since it is larger than the sum of its proper divisors (1).

38947351 is an equidigital number, since it uses as much as digits as its factorization.

38947351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 38947351 is about 6240.7812812179. The cubic root of 38947351 is about 338.9684739640.

The spelling of 38947351 in words is "thirty-eight million, nine hundred forty-seven thousand, three hundred fifty-one".