7638151 has 4 divisors (see below), whose sum is σ = 8087472. Its totient is φ = 7188832.

The previous prime is 7638149. The next prime is 7638167. The reversal of 7638151 is 1518367.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1518367 = 239 ⋅6353.

It is a cyclic number.

It is not a de Polignac number, because 7638151 - 2¹ = 7638149 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7632151) 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 in 3 ways as a sum of consecutive naturals, for example, 224635 + ... + 224668.

It is an arithmetic number, because the mean of its divisors is an integer number (2021868).

Almost surely, 2^7638151 is an apocalyptic number.

7638151 is a deficient number, since it is larger than the sum of its proper divisors (449321).

7638151 is a wasteful number, since it uses less digits than its factorization.

7638151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449320.

The product of its digits is 5040, while the sum is 31.

The square root of 7638151 is about 2763.7204996164. The cubic root of 7638151 is about 196.9379501729.

The spelling of 7638151 in words is "seven million, six hundred thirty-eight thousand, one hundred fifty-one".