38691967 has 2 divisors, whose sum is σ = 38691968. Its totient is φ = 38691966.

The previous prime is 38691953. The next prime is 38691979. The reversal of 38691967 is 76919683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38691967 - 2¹¹ = 38689919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38691967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38691907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19345983 + 19345984.

It is an arithmetic number, because the mean of its divisors is an integer number (19345984).

Almost surely, 2^38691967 is an apocalyptic number.

38691967 is a deficient number, since it is larger than the sum of its proper divisors (1).

38691967 is an equidigital number, since it uses as much as digits as its factorization.

38691967 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 38691967 is about 6220.2867297256. The cubic root of 38691967 is about 338.2259585227.

The spelling of 38691967 in words is "thirty-eight million, six hundred ninety-one thousand, nine hundred sixty-seven".