38691427 has 2 divisors, whose sum is σ = 38691428. Its totient is φ = 38691426.

The previous prime is 38691421. The next prime is 38691449. The reversal of 38691427 is 72419683.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38691427 - 2⁷ = 38691299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38691427.

It is not a weakly prime, because it can be changed into another prime (38691421) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19345713 + 19345714.

It is an arithmetic number, because the mean of its divisors is an integer number (19345714).

Almost surely, 2^38691427 is an apocalyptic number.

38691427 is a deficient number, since it is larger than the sum of its proper divisors (1).

38691427 is an equidigital number, since it uses as much as digits as its factorization.

38691427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 38691427 is about 6220.2433232149. The cubic root of 38691427 is about 338.2243850448.

The spelling of 38691427 in words is "thirty-eight million, six hundred ninety-one thousand, four hundred twenty-seven".