38634091 has 4 divisors (see below), whose sum is σ = 39880384. Its totient is φ = 37387800.

The previous prime is 38634073. The next prime is 38634103. The reversal of 38634091 is 19043683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19043683 = 4027 ⋅4729.

It is a cyclic number.

It is not a de Polignac number, because 38634091 - 2¹¹ = 38632043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38634041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623100 + ... + 623161.

It is an arithmetic number, because the mean of its divisors is an integer number (9970096).

Almost surely, 2^38634091 is an apocalyptic number.

38634091 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38634091 is a deficient number, since it is larger than the sum of its proper divisors (1246293).

38634091 is a wasteful number, since it uses less digits than its factorization.

38634091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246292.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 38634091 is about 6215.6327915989. The cubic root of 38634091 is about 338.0572332852.

The spelling of 38634091 in words is "thirty-eight million, six hundred thirty-four thousand, ninety-one".