7976138 has 4 divisors (see below), whose sum is σ = 11964210. Its totient is φ = 3988068.

The previous prime is 7976123. The next prime is 7976141. The reversal of 7976138 is 8316797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8316797 = 131 ⋅63487.

It can be written as a sum of positive squares in only one way, i.e., 5968249 + 2007889 = 2443^2 + 1417^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7976095 and 7976104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994033 + ... + 1994036.

Almost surely, 2^7976138 is an apocalyptic number.

7976138 is a deficient number, since it is larger than the sum of its proper divisors (3988072).

7976138 is a wasteful number, since it uses less digits than its factorization.

7976138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988071.

The product of its digits is 63504, while the sum is 41.

The square root of 7976138 is about 2824.2057290502. The cubic root of 7976138 is about 199.8009519651.

The spelling of 7976138 in words is "seven million, nine hundred seventy-six thousand, one hundred thirty-eight".