7963138 has 4 divisors (see below), whose sum is σ = 11944710. Its totient is φ = 3981568.

The previous prime is 7963117. The next prime is 7963141. The reversal of 7963138 is 8313697.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7491169 + 471969 = 2737^2 + 687^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7963097 and 7963106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990783 + ... + 1990786.

Almost surely, 2^7963138 is an apocalyptic number.

7963138 is a deficient number, since it is larger than the sum of its proper divisors (3981572).

7963138 is a wasteful number, since it uses less digits than its factorization.

7963138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981571.

The product of its digits is 27216, while the sum is 37.

The square root of 7963138 is about 2821.9032584410. The cubic root of 7963138 is about 199.6923436472.

The spelling of 7963138 in words is "seven million, nine hundred sixty-three thousand, one hundred thirty-eight".