38013691 has 2 divisors, whose sum is σ = 38013692. Its totient is φ = 38013690.

The previous prime is 38013671. The next prime is 38013697. The reversal of 38013691 is 19631083.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38013691 - 2²¹ = 35916539 is a prime.

It is not a weakly prime, because it can be changed into another prime (38013697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19006845 + 19006846.

It is an arithmetic number, because the mean of its divisors is an integer number (19006846).

Almost surely, 2^38013691 is an apocalyptic number.

38013691 is a deficient number, since it is larger than the sum of its proper divisors (1).

38013691 is an equidigital number, since it uses as much as digits as its factorization.

38013691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 38013691 is about 6165.5243897012. The cubic root of 38013691 is about 336.2379119768.

The spelling of 38013691 in words is "thirty-eight million, thirteen thousand, six hundred ninety-one".