7873139146 has 4 divisors (see below), whose sum is σ = 11809708722. Its totient is φ = 3936569572.

The previous prime is 7873139101. The next prime is 7873139147. The reversal of 7873139146 is 6419313787.

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., 7343633025 + 529506121 = 85695^2 + 23011^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7873139146.

It is not an unprimeable number, because it can be changed into a prime (7873139147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1968284785 + ... + 1968284788.

Almost surely, 2^7873139146 is an apocalyptic number.

7873139146 is a deficient number, since it is larger than the sum of its proper divisors (3936569576).

7873139146 is a wasteful number, since it uses less digits than its factorization.

7873139146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3936569575.

The product of its digits is 762048, while the sum is 49.

The square root of 7873139146 is about 88730.7114025353. The cubic root of 7873139146 is about 1989.3718837827.

The spelling of 7873139146 in words is "seven billion, eight hundred seventy-three million, one hundred thirty-nine thousand, one hundred forty-six".