7049042138 has 4 divisors (see below), whose sum is σ = 10573563210. Its totient is φ = 3524521068.

The previous prime is 7049042131. The next prime is 7049042153. The reversal of 7049042138 is 8312409407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8312409407 = 24593 ⋅337999.

It can be written as a sum of positive squares in only one way, i.e., 5564712409 + 1484329729 = 74597^2 + 38527^2 .

It is a super-2 number, since 2×7049042138² = 99377990126599222088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7049042131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1762260533 + ... + 1762260536.

Almost surely, 2^7049042138 is an apocalyptic number.

7049042138 is a deficient number, since it is larger than the sum of its proper divisors (3524521072).

7049042138 is a wasteful number, since it uses less digits than its factorization.

7049042138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524521071.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 7049042138 is about 83958.5739397710. The cubic root of 7049042138 is about 1917.3881349487.

The spelling of 7049042138 in words is "seven billion, forty-nine million, forty-two thousand, one hundred thirty-eight".